Subject to any agreement with the holders of its revenue bonds, the authority may:
(1) Notwithstanding any other law to the contrary, invest its moneys not required for immediate use, including proceeds from the sale of any revenue bonds, in any investment in accordance with procedures prescribed in a trust indenture;
(2) Purchase its revenue bonds out of any fund or money of the authority available therefor, and hold, cancel, or resell the revenue bonds.