Advertisements for mail transportation contracts

§ 6412. Advertisements for mail transportation contracts When advertising is required by law, the Postmaster General shall advertise, for a period of not less than 30 days, for bids for a contract for transporting the mails, unless he shall publish with the advertisement a finding that the public exigencies surrounding the particular contract require a shorter period. The advertisement shall be conspicuously posted in each post office to be served under the contract.