United States Statutes at Large/Volume 3/16th Congress/1st Session/Chapter 23
Chap. XXIII.—An Act in addition to an act, entitled “An act regulating the post-office establishment.”
Act of April 3, 1810, ch. 37.
The President of the Senate pro tem. and speaker of the House of Representatives, entitled to frank as the Vice President of the United States.Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, That during the present and every subsequent session of Congress, all letters and packets to and from the President of the Senate pro tempore, and the Speaker of the House of Representatives for the time being, shall be received and conveyed by mail, free of postage, under the same restrictions as are provided by law with respect to letter and packets to and from the Vice President of the United States.
Approved, March 13, 1820.