Definition

§ 4451. Definition (a) Third class mail consists of mailable matter which is— (1) not mailed or required to be mailed as first class mail; (2) not entered as second class mail; and (3) less than sixteen ounces in weight. (b) A person who presents for mailing at one time twenty or more identical copies of bills and statements of account produced by any photographic or mechanical process, other than typewriting, may mail them as third class mail. In other cases, bills and statements of account shall be mailed as first class mail. (c) Circulars, including printed letters which according to internal evidence are being sent in identical terms to several persons, are third class mail. A circular does not lose its character as such when the date and name of the addressee and of the sender are written therein, nor by the correction in writing of mere typographical errors. (d) Unsealed letters written in point print or raised characters, or on sound reproduction records, used by the blind are third class mail without regard to the limit on weight prescribed in subsection (a) (2) of this section. (e) Printed matter within the limit of weight set forth in subsection (a) of this section is third class mail. For the purpose of this subsection, printed matter is paper on which words, letters, characters, figures or images, or any combination thereof, not having the charac- 74 Stat. 673 ter of actual and personal correspondence, have been reproduced by any process other than handwriting or typewriting.