(1) This part shall in no manner repeal, modify, change, or interfere with any general or special statutes pertaining to municipal or county contracts or leases, including, but not limited to, those statutes pertaining to competitive bidding, conflicts of interest, public building authorities, purchasing, issuance of bonds, borrowing of money and incurring of debts, and appropriations.
(2) The authorization provided by this part shall be additional and supplemental to, and the limitations provided in this part shall not affect the powers or authorizations provided by any other law, and is not in substitution for the powers or authorizations conferred by any other law.