((a)) The Secretary may provide directly or by contract with State vocational rehabilitation agencies or experts or consultants or groups thereof, technical assistance—
((1)) to persons operating community rehabilitation programs; and
((2)) with the concurrence of the Access Board established by , to any public or nonprofit agency, institution, or organization;
((b)) Any such experts or consultants, while serving pursuant to such contracts, shall be entitled to receive compensation at rates fixed by the Secretary, but not exceeding the daily equivalent of the rate of pay for level 4 of the Senior Executive Service Schedule under , including travel time, and while so serving away from their homes or regular places of business, they may be allowed travel expenses, including per diem in lieu of subsistence, as authorized by for persons in the Government service employed intermittently.
((c)) The Secretary, with the concurrence of the Access Board and the President, may provide, directly or by contract, financial assistance to any public or nonprofit agency, institution, or organization for the purpose of removing architectural, transportation, and communication barriers. No assistance may be provided under this subsection until a study demonstrating the need for such assistance has been conducted and submitted under .
((d)) In order to carry out this section, there are authorized to be appropriated such sums as may be necessary.