Effective August 17, 2017, the Postal Service™ is revising Publication 52, Hazardous, Restricted, and Perishable Mail, in various sections to provide new mailing standards for mailpieces containing lithium batteries.
The Postal Service announced these revisions via a Federal Register notice titled “Revision to Mailing Standards for Lithium Batteries,” which was published on July 26, 2017 (82 FR 34712–34715). With these revisions, the Postal Service aligns its mailing standards with recent changes made by other federal regulatory agencies with regard to the transportation of lithium batteries.
Relative to lithium batteries, the International Civil Aviation Organization (ICAO) published addendum number 3 to its Technical Instructions on January 15, 2016, and addendum number 4 on February 23, 2016. In these addenda, ICAO announced new regulations for lithium batteries in air transportation. Effective April 1, 2016, the ICAO revisions detailed a number of new provisions including:
n The prohibition of lithium-ion (and lithium polymer) batteries, shipped separately from the equipment they are intended to operate (categorized as identification number UN3480), on passenger aircraft.
n The restriction of UN3480 batteries and cells shipped via cargo aircraft to a maximum state of charge (SOC) of no more than 30 percent.
n The limitation of section II, UN3480 batteries and cells to a single package, when sent as a part of a consignment or overpack via cargo aircraft.
n The required use of an approved Cargo Aircraft Only (CAO) label on all packages of UN3480 batteries and cells transported via cargo aircraft.
On March 30, 2017, the Department of Transportation’s (DOT’s) Pipeline and Hazardous Materials Safety Administration (PHMSA) published its final rule titled “Hazardous Materials: Harmonization with International Standards RRR,” HM-215N (82 FR 15796–15897), which generally adopted a proposed rule published on September 7, 2016. In its final rule, PHMSA stated that its revisions were necessary to harmonize the Hazardous Materials Regulations (HMR) with recent changes made to the following:
n The International Maritime Dangerous Goods (IMDG) Code.
n The International Civil Aviation Organization’s (ICAO’s) Technical Instructions for the Safe Transport of Dangerous Goods by Air.
n The United Nations Recommendations on the Transport of Dangerous Goods — Model Regulations.
The PHMSA final rule also included a number of new regulations for the transport of lithium batteries.
On February 22, 2017, the Postal Service responded by publishing a notice with an invitation to comment (82 FR 11372), “Revision to Mailing Standards for the Transport of Lithium Batteries.” In this notice, the Postal Service announced its intent to revise Publication 52 to align with the following:
n The ICAO Technical Instructions for the Safe Transport of Dangerous Goods by Air (ICAO Technical Instructions).
n The PHMSA proposed rule of September 7, 2016.
The Postal Service received four comments in response to its February 22 notice of intent — two from airline pilot associations, one from a hazardous materials trade association, and one from the Congressional Delegation from the state of Alaska. In response to these commenter’s concerns, the Postal Service adopted additional restrictions applicable to some mailings of lithium batteries and introduced a provision to permit limited mailings of UN3480 batteries via Postal Service air transportation within the state of Alaska. As a result, the Postal Service will:
n Generally prohibit UN3480 lithium-ion and lithium polymer batteries in Postal Service air-eligible products.
n Revise its quantity limitations for UN3480 lithium-ion and lithium polymer batteries in surface transportation to align with those for lithium metal batteries — changing from the previous 8 cells or 2 batteries to an aggregate mailpiece limit of 5 pounds.
n Accept and evaluate requests for exceptions to mail UN3480 batteries used to support critical medical devices via domestic air-eligible products. The batteries must be within current Postal Service capacity and quantity limitations, necessary for the emergency support of critical medical devices, and have no other reasonable alternative for delivery within an acceptable period. The Postal Service defers revision to Publication 52 relating to these authorizations until it has determined the level of interest and the need for these exceptions. Before granting any authorizations, the Postal Service plans to consult with PHMSA to ensure alignment with their approval processes for commercial carriers. Interested mailers may direct requests to the manager, Product Classification (see Publication 52, part 214, for the complete address).
n Permit UN3480 batteries meeting the current USPS® capacity limitations and quantity restrictions to be mailed via air-eligible products, if these mailings are both mailed and delivered within the state of Alaska.
n Eliminate the current text marking option for mailpieces required to bear, or optionally permitted to bear, lithium battery markings under Publication 52, sections 349.221a(6) and 349.222a(6), and limit markings to DOT-approved lithium battery marks.
n Require a separate “prohibited on passenger aircraft” text marking, in addition to a DOT-approved lithium battery mark, for mailpieces containing UN3480 and UN3090 batteries. This marking is only appropriate for, and restricted to, surface transportation.
n Permit the optional use of previously authorized lithium battery marks during PHMSA’s transitional period for these marks until December 31, 2018.
n Eliminate the requirement for accompanying documentation with mailings of lithium batteries.
n Add the new DOT class 9 hazard warning label for lithium batteries to Publication 52, Exhibit 325.1, DOT Hazardous Materials Warning Labels: PROHIBITED IN THE MAIL.
n Require the outer packaging of mailpieces containing small lithium batteries to be rigid and of adequate size so the lithium battery mark can be affixed on the address side without the mark being folded.
n Require lithium battery marks to be placed on the address side of all mailpieces bearing these marks.
n Permit the use of padded and poly bags as outer packaging for mailpieces containing button cell batteries properly installed in the equipment they are intended to operate, provided the batteries are afforded adequate protection by the equipment, and the batteries meet the USPS classification criteria for a button cell battery in section 349.11d of Publication 52.
n Define a lithium battery consignment as one or more mailpieces containing lithium batteries that is entered into USPS networks by one mailer or mail service provider within a single mailing or retail transaction, or included in the same manifest or shipping services file, and intended for delivery to a single consignee at a single destination address.
n Require DOT-approved lithium battery markings on all mailpieces containing lithium cells or batteries contained in equipment when there are more than two mailpieces in a single consignment in domestic mail.
n Limit a single consignment to two mailpieces containing lithium batteries for international and APO/FPO/DPO mail.
The Postal Service will allow a transitional period until January 1, 2018, for the mailing standards described in this notice. During the transitional period, we urge mailers to comply with the new mailing standards, but compliance will not be mandatory until January 1, 2018.
Publication 52, Hazardous, Restricted, and Perishable Mail
* * * * *
3 Hazardous Materials
* * * * *
32 General
* * * * *
325 DOT Hazardous Materials Warning Labels
325.1 Nonmailable Warning Labels
* * * * *
Exhibit 325.1
DOT Hazardous Materials Warning Labels: PROHIBITED IN THE MAIL
[Add a new Lithium Battery Class 9 label to the list of DOT warning labels prohibited in the mail as shown:]
* * * * *
325.2 Mailable Warning Labels
* * * * *
Exhibit 325.2a
DOT Hazardous Materials Warning Labels: PERMITTED ON MAILABLE HAZARDOUS MATERIALS
* * * * *
[Replace the current lithium battery handling label (lower left) with the GHS lithium battery mark shown here:]
* * * * *
327 Transportation Requirements
* * * * *
327.2 Air Transportation Prohibitions
* * * * *
[Add new 327.2f to read as follows and renumber the current 327.2f as the new 327.2g.]
f. UN3090, lithium metal batteries (including lithium alloy batteries), and UN3480 lithium-ion batteries (including lithium polymer batteries).
* * * * *
34 Mailability by Hazard Class
* * * * *
349 Miscellaneous Hazardous Materials (Hazard Class 9)
349.1 Definition
* * * * *
349.12 Lithium Battery — Definitions
* * * * *
[Add new 349.12b to read as follows and renumber the current 349.12b and c as the new 349.12c and d.]
b. Lithium battery consignment means one or more mailpieces containing lithium batteries, entered into USPS networks by one mailer or mail service provider within a single mailing or retail transaction, or included in the same manifest or shipping services file, and intended for delivery to a single consignee at a single destination address.
* * * * *
349.2 Mailability
* * * * *
349.21 Nonmailable Class 9 Materials
* * * * *
[Revise the text of 349.21f to read as follows:]
f. All lithium batteries in domestic air transportation, unless they are within the specified limits and only when properly installed in, or packed with, the equipment they are intended to operate.
349.22 Mailable Class 9 Materials
349.221 Lithium Metal (Nonrechargeable) Cells and Batteries — Domestic
* * * * *
[Revise the text of 349.221a(5), (6), and (7) to read as follows:]
(5) All packaging must meet applicable requirements specified in 49 CFR 173.185. Except for mailpieces containing button cell batteries properly installed in the equipment they are intended to operate, mailpieces containing lithium metal batteries must be rigid, sealed, and of adequate size, so the mark can be affixed to the address side without the mark being folded. The use of padded and poly bags as outer packaging is permitted only when the mailpieces contain button cell batteries meeting the classification criteria in 349.11d, the batteries are properly installed in the equipment they are intended to operate, and the batteries are afforded adequate protection by that equipment.
(6) Except for mailpieces containing button cell batteries installed in equipment (including circuit boards), or no more than 4 lithium metal cells or 2 lithium metal batteries installed in the equipment they are intended to operate, mailpieces containing lithium metal batteries must bear a DOT-approved lithium battery mark, as specified in 49 CFR 173.185(c)(i) and Exhibit 325.2a, applied to the address side of the mailpiece. Marks must not be applied in such a manner that parts of the mark appear on different sides of the mailpiece.
(7) The mark must indicate UN3090 for lithium metal cells or batteries. UN3091 must be indicated where the lithium cells or batteries are contained in or packed with the equipment they are intended to operate. The mark must also include a telephone number for those who need to obtain additional information.
* * * * *
[Revise the text of 349.221b(3) to read as follows:]
(3) The equipment must be cushioned to prevent movement or damage and, unless excepted under 349.221a(5), must be contained in rigid outer packaging, sealed and strong enough to prevent crushing of the package or exposure of the contents during normal handling in the mail.
* * * * *
[Revise the text of 349.221b(6) to read as follows:]
(6) When required or optionally applied, mailpieces must display a DOT-approved lithium battery mark on the address side.
[Add new 349.221b(7) to read as follows:]
(7) DOT-approved lithium battery markings must be applied to all mailpieces when there are more than two mailpieces in a single consignment as defined in 349.12b.
* * * * *
[Revise the text of 349.221c(3) to read as follows:]
(3) The shipment must be cushioned to prevent movement or damage, and must be contained in rigid outer packaging, sealed and strong enough to prevent crushing of the package or exposure of the contents during normal handling in the mail.
* * * * *
[Revise the text of 349.221c(6) to read as follows:]
(6) Mailpieces must display a DOT-approved lithium battery mark on the address side.
* * * * *
[Revise the text of 349.221d(3) to read as follows:]
(3) shipment must be cushioned to prevent movement or damage, and must be contained in rigid outer packaging, sealed and strong enough to prevent crushing of the package or exposure of the contents during normal handling in the mail.
* * * * *
[Revise the text of 349.221d(5) to read as follows:]
(5) Mailpieces must display a DOT-approved lithium battery mark on the address side, in addition to the text “Surface Mail Only, Primary Lithium Batteries — Forbidden for Transportation Aboard Passenger Aircraft” or “Surface Mail Only, Lithium Metal Batteries — Forbidden for Transportation Aboard Passenger Aircraft.”
* * * * *
349.222 Lithium-ion (Rechargeable) Cells and Batteries — Domestic
* * * * *
[Add new 349.222a(3) to read as follows and renumber the current 349.222a(3) through a(7) as the new 349.222a(4) through a(8).]
(3) Each battery must bear the “Watt-hour” or “Wh” marking on the battery to determine if it is within the limits defined in items 1 and 2.
* * * * *
[Revise renumbered 349.222a(6) to read as follows:]
(6) All packaging must meet applicable requirements specified in 49 CFR 173.185. Except for mailpieces containing button cell batteries properly installed in the equipment they are intended to operate, mailpieces containing lithium-ion batteries must be rigid, sealed, and of adequate size, so the mark can be affixed to the address side without the mark being folded. The use of padded and poly bags as outer packaging is permitted only when the mailpieces contain button cell batteries meeting the classification criteria in 349.11d, the batteries are properly installed in the equipment they are intended to operate, and the batteries are afforded adequate protection by that equipment.
[Revise renumbered 349.222a(7) to read as follows:]
(7) Except for mailpieces containing button cell batteries installed in equipment (including circuit boards), or no more than 4 lithium-ion cells or 2 lithium-ion batteries installed in the equipment they operate, mailpieces containing lithium-ion batteries must bear a DOT-approved lithium battery mark, as specified in 49 CFR 173.185(c)(i) and Exhibit 325.2a, applied to the address side of the mailpiece. Marks must not be applied in such a manner that parts of the mark appear on different sides of the mailpiece. Where the lithium cells or batteries are shipped separately from equipment, the mark must indicate UN3480. Where the lithium cells or batteries are contained in, or packed with, equipment, UN3481 must be indicated. The mark must also include a telephone number for those who need to obtain additional information.
[Delete renumbered 349.222a(8) in its entirety.]
* * * * *
[Revise 349.222b(3) to read as follows:]
(3) The equipment must be cushioned to prevent movement or damage and, unless excepted under 349.222a(7), must be contained in rigid outer packaging, sealed and strong enough to prevent crushing of the package or exposure of the contents during normal handling in the mail.
* * * * *
[Revise the text of 349.222b(6) to read as follows:]
(6) When required or optionally applied, mailpieces must display a DOT-approved lithium battery mark on the address side.
[Add new 349.222b(7) to read as follows:]
(7) DOT-approved lithium battery markings must be applied to all mailpieces when there are more than two mailpieces in a single consignment as defined in 349.12b.
* * * * *
[Revise the text of 349.222c(3) and c(4) to read as follows:]
(3) The shipment must be cushioned to prevent movement or damage, and must be contained in rigid outer packaging, sealed and strong enough to prevent crushing of the package or exposure of the contents during normal handling in the mail.
(4) Mailpieces must display a DOT-approved lithium battery mark on the address side.
* * * * *
[Revise the text of 349.222d(1) to read as follows:]
(1) The lithium-ion cells and batteries must be mailed in “the originally sealed packaging.”
* * * * *
[Revise the text of 349.222d(3) to read as follows:]
(3) The shipment must be cushioned to prevent movement or damage, and must be contained in rigid outer packaging, sealed and strong enough to prevent crushing of the package or exposure of the contents during normal handling in the mail.
[Delete current 349.222d(4) and 222d(5) and add new 349.222d(4) through 222d(8) to read as follows:]
(4) Unless both mailed from, and intended for delivery to, the state of Alaska under 349.222d(7), mailpieces must be sent by surface transportation only.
(5) The mailpiece must not exceed 5 pounds.
(6) Mailpieces must display a DOT-approved lithium battery mark on the address side, in addition to the text “Surface Mail Only, Secondary Lithium Batteries — Forbidden for Transportation Aboard Passenger Aircraft” or “Surface Mail Only, Lithium-ion Batteries — Forbidden for Transportation Aboard Passenger Aircraft.”
(7) Cells having a watt-hour rating of not more than 20 Wh, and batteries having a watt-hour rating of not more than 100 Wh may be mailed via air transportation only when both mailed from, and intended for delivery within, the state of Alaska. Each mailpiece must contain no more than 8 cells or 2 batteries.
(8) Mailpieces must display a DOT-approved lithium battery mark on the address side.
Exhibit 349.222
Domestic Lithium Battery Mailability
* * * * *
6 International Mail
* * * * *
62 Hazardous Materials: International Mail
* * * * *
622 Mailable Hazardous Materials
* * * * *
622.5 Lithium and Lithium-ion Cells and Batteries — General
[Add a new last sentence to 622.5 and new items a, b, and c to read as follows:]
***The following restrictions also apply:
a. The batteries must be installed in the equipment being shipped.
b. The equipment must be cushioned to prevent movement or damage and must be contained in rigid outer packaging, sealed and strong enough to prevent crushing of the package or exposure of the contents during normal handling in the mail.
c. A lithium battery consignment, as defined in 349.12b, is limited to a maximum of two mailpieces for all international and APO/FPO/DPO mailings.
622.51 Lithium Metal (Non-Rechargeable) Cells and Batteries
[Delete 622.51a in its entirety and renumber the current 622.51b through 622.51h as the new 622.51a through 622.51g.]
* * * * *
[Delete renumbered 622.51f in its entirety and renumber the current 622.51g and as the new 622.51f.]
622.52 Lithium-ion (Rechargeable) Cells and Batteries
[Delete 622.52a in its entirety and renumber the current 622.52b through 622.52i as the new 622.52a through 622.52h.]
* * * * *
[Revise new 622.52d to read as follows:]
d. Each battery must bear the “Watt-hour” or “Wh” marking on the battery to determine if it is within the limits defined in items b and c.
* * * * *
[Delete renumbered 622.52g in its entirety and renumber the current 622.52h as the new 622.52g.]
* * * * *
Appendix A
Hazardous Materials Table: Postal Service Mailability Guide
* * * * *
*
* * * * *
[Revise the entry for UN3480, Lithium-ion batteries under column “f,” Domestic Mail Air, to read as follows:]
* * * * *
[Delete the extraneous “Lithium Battery” entry, between the “Lithium aluminum hydride, ethereal” and “Lithium borohydride” entries, in its entirety.]
* * * * *
Appendix C
USPS Packaging Instructions for Mailable Hazardous Materials
* * * * *
USPS Packaging Instruction 9D
Lithium Metal and Lithium-ion Cells and Batteries — Domestic
[Revise the introductory text of USPS Packaging Instruction 9D to read as follows:]
Lithium metal (nonrechargeable) cells and batteries and lithium-ion (rechargeable) cells and batteries are mailable in limited quantities domestically via air or surface transportation when they are installed in or packed with the equipment they are intended to operate. Unless otherwise excepted, lithium metal and lithium-ion batteries (without equipment) are mailable in limited quantities domestically via surface transportation only.
[Delete the bulleted text below the introductory paragraph in its entirety.]
* * * * *
Mailability
* * * * *
[Revise the text of the second bullet under Mailability and add a new third bullet to read as follows:]
n Lithium-ion (or lithium polymer) batteries may be mailed, in limited quantities, via air transportation when both shipped from, and intended for delivery to, the state of Alaska under 349.222.
n Except as provided above, individual lithium metal (or lithium alloy) and lithium-ion (or lithium polymer) batteries (without equipment) are mailable in limited quantities via surface transportation only, provided the batteries are in the originally sealed packaging, and packaged and marked as described in 349.221 and 349.222, as applicable.
Required Packaging
Lithium Metal and Lithium-ion Batteries
[Revise the text to read as follows:]
n Packaging must meet all applicable requirements specified in 49 CFR 173.185. Except for mailpieces containing button cell batteries properly installed in the equipment they are intended to operate, mailpieces containing mailable lithium metal or lithium-ion batteries must be rigid, sealed, and of adequate size, so the lithium battery mark can be affixed to the address side without the mark being folded.
n Packaging must be strong enough to prevent crushing of the package or exposure of the contents during normal handling in the mail.
n The use of padded and poly bags as outer packaging is permitted only when the mailpieces contain button cell batteries meeting the classification criteria in 349.11d, the batteries are properly installed in the equipment they are intended to operate, and the batteries are afforded adequate protection by that equipment.
n All outer packages must have a complete delivery and return address.
Markings
n Lithium metal batteries properly installed in the equipment they are intended to operate:
[Revise the supporting text to read as follows:]
n Except for mailpieces containing button cell batteries installed in equipment (including circuit boards), or no more than 4 lithium metal cells or 2 lithium metal batteries installed in the equipment they operate, mailpieces containing lithium metal batteries must bear a DOT-approved lithium battery mark, as specified in 49 CFR 173.185(c)(i) and Exhibit 325.2a, applied to the address side of the mailpiece.
n The mark must indicate UN3091 for lithium metal cells or batteries installed in equipment.
n Where a package contains lithium cells or batteries assigned to different UN numbers, all applicable UN numbers must be indicated.
n The mark must also include a telephone number for those who need to obtain additional information.
Note: DOT-approved lithium battery markings must be applied to all mailpieces when there are more than two mailpieces in a single consignment as defined in 349.12b.
n Lithium metal batteries packed with the equipment they are intended to operate:
[Revise the supporting text to read as follows:]
n Mailpieces must bear a DOT-approved lithium battery mark, as specified in 49 CFR 173.185(c)(i) and Exhibit 325.2a, applied to the address side of the mailpiece.
n The mark must indicate UN3091 for lithium metal cells or batteries packed with equipment.
n The mark must also include a telephone number for those who need to obtain additional information.
n Lithium metal batteries not packed with or installed in equipment (individual batteries):
[Revise the supporting text to read as follows:]
n Mailpieces must bear a DOT-approved lithium battery mark, as specified in 49 CFR 173.185(c)(i) and Exhibit 325.2a, applied to the address side of the mailpiece.
n The mark must indicate UN3090 for lithium metal cells or batteries.
n The mark must also include a telephone number for those who need to obtain additional information.
n Mailpieces must also include the text “Surface Mail Only, Primary Lithium Batteries — Forbidden for Transportation Aboard Passenger Aircraft” or “Surface Mail Only, Lithium Metal Batteries — Forbidden for Transportation Aboard Passenger Aircraft.”
n Lithium-ion batteries properly installed in the equipment they are intended to operate:
[Revise the supporting text to read as follows:]
n Except for mailpieces containing button cell batteries installed in equipment (including circuit boards), or no more than 4 lithium metal cells or 2 lithium-ion batteries installed in the equipment they operate, mailpieces containing lithium-ion batteries must bear a DOT-approved lithium battery mark, as specified in 49 CFR 173.185(c)(i) and Exhibit 325.2a, applied to the address side of the mailpiece.
n The mark must indicate UN3481 for lithium-ion cells or batteries installed in equipment.
n The mark must also include a telephone number for those who need to obtain additional information.
Note: DOT-approved lithium battery markings must be applied to all mailpieces when there are more than two mailpieces in a single consignment as defined in 349.12b.
n Lithium-ion batteries packed with the equipment they are intended to operate:
[Revise the supporting text to read as follows:]
n Mailpieces must bear a DOT-approved lithium battery mark, as specified in 49 CFR 173.185(c)(i) and Exhibit 325.2a, applied to the address side of the mailpiece.
n The mark must indicate UN3481 for lithium-ion cells or batteries packed with equipment.
n Where a package contains lithium cells or batteries assigned to different UN numbers, all applicable UN numbers must be indicated.
n The mark must also include a telephone number for those who need to obtain additional information.
n Lithium-ion batteries not packed with or installed in equipment (individual batteries):
[Revise the supporting text to read as follows:]
n Mailpieces must bear a DOT-approved lithium battery mark, as specified in 49 CFR 173.185(c)(i) and Exhibit 325.2a, applied to the address side of the mailpiece.
n The mark must indicate UN3480 for lithium-ion cells or batteries.
n The mark must also include a telephone number for those who need to obtain additional information.
n Mailpieces must also include the text “Surface Mail Only, Secondary Lithium Batteries — Forbidden for Transportation Aboard Passenger Aircraft” or “Surface Mail Only, Lithium-ion Batteries — Forbidden for Transportation Aboard Passenger Aircraft.”
Quantities
* * * * *
Domestic — Lithium-ion Cells and Batteries:
[Revise the text of the introductory sentence, to remove reference to batteries shipped separately, to read as follows:]
Installed in or packed with the equipment they are intended to operate:
* * * * *
[Add a new subsection in “Quantities,” applicable to lithium-ion batteries shipped separately, to read as follows:]
Individual batteries mailed without equipment:
n The total watt-hour rating for each cell must not exceed 20 Wh.
n The total watt-hour rating for each battery must not exceed 100 Wh.
n The mailpiece must not exceed 5 pounds.
* * * * *
Domestic Lithium Battery Mailability Exhibit
* * * * *
USPS Packaging Instruction 9E
Lithium Metal and Lithium-ion Cells and Batteries — International and APO/FPO/DPO
* * * * *
Required Packaging
Lithium Metal and Lithium-ion Batteries
[Revise the text of the first bullet to read as follows:]
n The equipment must be cushioned to prevent movement or damage, and must be contained in rigid outer packaging, sealed and strong enough to prevent crushing of the package or exposure of the contents during normal handling in the mail.
* * * * *
Quantities
[Revise the title of International — Lithium Metal Cells and Batteries to read as follows:]
International — Lithium Metal and Lithium-ion Cells and Batteries:
* * * * *
[Add a new note at the end of the “Installed in equipment” subsection to read as follows:]
Note: A lithium battery consignment, as defined in 349.12b, is limited to a maximum of two mailpieces for all international and APO/FPO/DPO mailings.
International — Very Small Lithium Metal and Lithium-ion Cells and Batteries:
* * * * *
[Add a new note at the end of the “Installed in equipment” subsection to read as follows:]
Note: A lithium battery consignment, as defined in 349.12b, is limited to a maximum of two mailpieces for all international and APO/FPO/DPO mailings.
* * * * *
We will incorporate these revisions into the next online update of Publication 52, Hazardous, Restricted, and Perishable Mail, which is available via Postal Explorer® at pe.usps.com.
— Product Classification, Marketing, 8-17-17
