The payments required by this section on the part of the United States shall be made within 30 days of the Secretary’s determination that the Seneca Nation has complied with section
1774b of this title, or upon the availability of the amounts necessary to carry out this subchapter, if such determination has previously been made. If the Secretary determines that the Seneca Nation has not complied with section
1774b of this title, he shall advise the Seneca Nation in writing of all steps it must take to comply.