An authority may purchase or make commitments to purchase mortgage loans from any financial institution, pension or retirement fund, any fiduciary or any other person or governmental or business entity. An authority may also sell or make commitments to sell mortgage loans to any pension or retirement fund, any fiduciary or any other person, governmental or business entity or financial institution. An authority may exercise all rights and powers of a holder of any such mortgage loan.   [PL 1987, c. 737, Pt. A, §2 (NEW); PL 1987, c. 737, Pt. C, §106 (NEW); PL 1989, c. 6 (AMD); PL 1989, c. 9, §2 (AMD); PL 1989, c. 104, Pt. C, §§8, 10 (AMD).]