The President is authorized to utilize the services of the Federal Highway Administration in fulfilling the obligations of the United States under the Convention on the Pan-American Highway Between the United States and Other American Republics (
51 Stat. 152), cooperating with several governments, members of the Organization of American States, in connection with the survey and construction of the Inter-American Highway, and for performing engineering service in the other American Republics for and upon the request of any agency or governmental corporation of the United States. To the extent authorized in appropriation acts, administrative funds available in accordance with subsection (a) of section
104 of this title shall be available annually for the purpose of this section.