the first payment shall be made not later than July 1 of each year in an amount equal to 80 percent of the amount which the grantee was entitled to receive during the preceding academic year; and

the second payment, consisting of the remainder to which the grantee is entitled for the academic year, shall be made not later than December 1 of each year.

invested by the Indian tribe or tribal organization only in obligations of the United States, or in obligations or securities that are guaranteed or insured by the United States, or mutual (or other) funds registered with the Securities and Exchange Commission and which only invest in obligations of the United States, or securities that are guaranteed or insured by the United States; or

deposited only into accounts that are insure by and 1 agency or instrumentality of the United States, or are fully collateralized to ensure protection of the funds, even in the event of a bank failure.