You can get more information from your local Post Office, your local Business Mail Entry Unit, and the Pricing and Classification Service Center (PCSC), which can be contacted at:
PCSC
90 Church Street STE 3100
New York, NY 10007-2951
Telephone: 212-330-5300
Fax: 212-330-5320
Notice 128
September 2012
PSN 7610-08-000-1489