The municipality making any such conveyance and the municipality to which such conveyance is to be made are hereby authorized to enter into any agreements which they may deem necessary or appropriate in order to effectuate such transfer and may include in the instrument of transfer any conditions or stipulations deemed advisable by their respective governing bodies and authorized by ordinance or resolution adopted by the governing body of each such municipality. Nothing contained in this article shall be construed to authorize any municipality to convey any system or systems or part thereof so as to vest title thereto in private ownership and control; provided, that title to any system or systems or part thereof may be subjected to a mortgage, deed of trust, or pledge agreement as security for repayment of money borrowed by the municipality to which such conveyance is made.