Compact Impact Grant Anticipation Bonds issued by GEDCA pursuant to the provisions of this Article and every contract relating to the issuance of such bonds shall provide that all financial obligations of the government of Guam in regard to the portion of the principal of and interest on such bonds that shall be paid from money available as Compact Impact Aid for Guam under Section (104)(c)(6) of U.S. Public Law 99-239 and as recently reauthorized in U.S. Public Law 108-188 for the next twenty (20) years, pursuant to Federal laws and any agreement shall be subject to continuing Federal appropriations of the money available as Compact Impact Aid for Guam under Section(104)(c)(6) of U.S. Public Law 99-239 and as recently reauthorized in U.S. Public Law 108-188 for the next twenty (20) years, at a level equal to or greater than the amount needed to pay principal and interest on the Compact Impact Grant Anticipation Bonds.