Pub. L. 95-429, tit. III, under "Special Assistance to the President"
Special Assistance to the President
Special Assistance to the President salaries and expenses For expenses necessary to enable the Vice President to provide assistance to the President in connection with specially assigned functions, services as authorized by 5 U.S.C. 3109, but at rates for individuals not to exceed the per diem equivalent of the rate for grade GS–18, compensation for one position at a rate not to exceed the rate of level II of the Executive Schedule, and other personal services without regard to the provisions of law regulating the employment and compensation of persons in the Government service, including hire of passenger motor vehicles, $1,280,000.