Public Law 75–805

That section

Postal Service.

17 Stat. 312.

39 U. S. C. § 500.

239 of the Act of June 8, 1872 (17 Stat. 312; U. S. C., title 39, sec 500), be, and the same is hereby, amended to read as follows :

“All letters enclosed in envelopes with embossed postage thereon,

Transportation of letters in designated stamped envelopes outside of the mails.

or with postage stamp or stamps affixed thereto, by the sender, or with the metered indicia showing that the postage has been prepaid, if the postage thereon is of an amount sufficient to cover the postage that would be chargeable thereon if the same were sent by mail, may

Conditions.

be sent, conveyed, and delivered otherwise than by mail, provided such envelope shall be duly directed and properly sealed, so that the letter cannot be taken therefrom without defacing the envelope, and the date of the letter or of the transmission or receipt thereof shall be written or stamped upon the envelope, and that where stamps are

Suspension of provisions.

affixed they be canceled with ink by the sender. But the Postmaster General may suspend the operation of this section or any part thereof upon any mail route where the public interest may require such suspension.”