After consultation with affected mainline air carriers, the Postal Service may establish either of the following requirements for mainline service between any two points served by more than one carrier:
The Postal Service may select an air carrier other than an existing mainline air carrier for mail tender if the Postal Service determines that the mail service provided by existing mainline air carriers remains deficient after it has notified the air carriers in writing and has allowed a 30-day correction period. (See 6-2.4.2.4.)