Pub. L. 86-682, tit. 39, pt. IV, ch. 63, sec. 4351
Definition
§ 4351. Definition Second class mail embraces newspapers and other periodical publications when entered and mailed in accordance with sections 4352–4357 of this title
Pub. L. 86-682, tit. 39, pt. IV, ch. 63, sec. 4351