The amount of the awards made pursuant to this section shall be established by the President, but shall not in any case exceed the highest rate which may be paid to an employee under the General Schedule established by section
5332 of title
5. In addition, where appropriate, the President may make provisions for transportation, housing (when assigned outside country of residence), subsistence (or per diem in lieu thereof), and health care or health or accident insurance for Institute Fellows and their dependents while engaged in activities authorized by this chapter.