22 CFR § 181.5 - Twenty-day rule for concluded agreements.
(a) Any agency, including the Department of State, that concludes an international agreement within the meaning of the Act and of 1 U.S.C. 112a, whether entered into in the name of the U.S. Government or in the name of the agency, must transmit the text of the concluded agreement to the Office of the Assistant Legal Adviser for Treaty Affairs as soon as possible and in no event to arrive at that office later than 20 days after the agreement has been signed. The 20-day limit, which is required by the Act, is essential for purposes of permitting the Department of State to meet its obligation under the Act to transmit concluded agreements to the Congress no later than 60 days after their entry into force.
(b) In any case of transmittal after the 20-day limit, the agency or Department of State office concerned may be asked to provide to the Assistant Legal Adviser for Treaty Affairs a statement describing the reasons for the late transmittal. Any such statements will be used, as necessary, in the preparation of the annual report on late transmittals, to be signed by the President and transmitted to the Congress, as required by subsection (b) of the Act.