Purchases of the following shall not be required to be included in any utility district policy:
(1) Purchases made under § 12-3-1201;
(2) Purchases from instrumentalities created by two (2) or more cooperative governments, such as, but not limited to, the Local Government Data Processing Corporation;
(3) Purchases from nonprofit corporations, such as, but not limited to, the Local Government Data Processing Corporation, whose purpose or one (1) of whose purposes is to provide goods or services specifically to various forms of local governments, including utility districts;
(4) Purchases, leases, or lease-purchases of real property; and
(5) Purchases, leases, or lease-purchases from any federal, state, or local government.