PUBLIC LAW 8 6 - 6 8 2 - S E P T. 2, 1960
[74 S T A T.
sages, orders, notices and other communications, either printed or written in pencil or ink. (c) Post cards are privately printed mailing cards for the transmission of messages. They may not be larger than the size fixed by the Convention of the Universal Postal Union in effect and of approximately the same form, quality and weight as postal cards. (d) Drop letters are letters— (1) mailed for local delivery at post offices where letter carrier service is not established; and (2) neither collected nor delivered by rural or star route carriers. § 4252. Weight limit The maximum weight of first class mail is the same as the maximum limit applicable to fourth class mail. § 4253. P o s t a g e r a t e s on first class mail (a) Postage on first class mail is computed separately on each letter or piece of mail. The rate of postage on first class mail is four cents for each ounce or fraction of an ounce, except that the rate— (1) on drop letters is three cents for each ounce or fraction of an ounce; (2) for each single postal card and each portion of a double postal card, including the cost of manufacture, is three cents; (3) for each post card and the initial portion of each double post card conforming to section 4251(c) of this title is three cents. (b) The rate of postage on business reply mail is the regular rate prescribed in subsection (a) of this section together with an additional charge thereon of two cents for each piece weighing two ounces or less and five cents for each piece weighing more than two ounces. The postage and charge shall be collected on delivery. § 4254. Business reply mail The Postmaster may accept for transmission in the mails, without prepayment of postage, business reply cards, letters, and business reply envelopes, and any other matter under business reply labels. CHAPTER 61—AIR MAIL A N D AIR PARCEL POST Sec.
4301. 4302. 4303. 4304. 4300.
Definitions. Treatment of air mail. Postage rates on air mail. Postage on Alaskan air mail. Size and weiglit limits.
§ 4301. Definitions As used in this chapter— (1) "domestic air mail" means matter bearing postage at the rates of postage prescribed in sections 4303 and 4304 of this title which is mailed in the United States Postal Service for transportation by air and delivery by the United States Postal Service. (2) "air parcel post" means domestic air mail of any class weighing in excess of eight ounces. § 4302. Treatment of air mail (a) Except with respect to the postage required, domestic air mail, other than air parcel post, shall be treated as first class mail. (b) The Postmaster General shall prescribe the conditions under which air parcel post shall be— (1) forwarded or returned to the sender; (2) charged with forwarding or return postage; and (3) registered, insured, or given C. O. D. service.