. "isions of Section 350(e)(3) of the NHS Act. (c) Subject to limitations under ISTEA, TEA-21, the NHS Act, SAFETEA-LU and other federal laws, other laws respecting the use of particular monies in the fund; and the provisions of any applicable trust agreement, amounts in the fund may be used only: (i) to pay the principal, including sinking fund payments of and premium," . . .