In order to facilitate operation of teaching hospital facilities at Howard University, there are authorized to be appropriated annually to the university such sums as the Congress may determine, for the partial support of the operation of such facilities giving consideration to the cost imposed by the provisions of section 125 of this title and the portion of the agreement under sections 124 to 129 of this title relating to such provisions. The cost of operating such facilities, the appropriations pursuant to this section, and any other income derived from such operation or available for such purpose shall be identified and accounted for separately in the accounts of the university.