Section 331.58 - Power of local authority to borrow money and issue negotiable bonds; purpose; payment of principal and interest; bond or coupon not general obligation or debt(1) For the purpose of defraying the project costs of hospital facilities, making hospital loans, refinancing indebtedness of a hospital, or refunding or refunding in advance obligations of any authority created or incorporated under this act, a local authority may borrow money and issue its negotiable bonds. The principal and interest of the bonds shall be payable solely from the net revenues derived from the hospital facilities, from the repayment of hospital loans, from gifts or grants, from amounts derived from the disposition of hospital facilities mortgaged or otherwise pledged as security for payment of the bonds or from investment earnings or profits on any of these sources.(2) A bond or coupon issued pursuant to this act shall not be a general obligation of nor constitute a debt of the local authority or any of the incorporating units within the meaning of any constitutional, charter, or statutory limitation.1969, Act 38, Imd. Eff. 7/14/1969 ;--Am. 1978, Act 277, Imd. Eff. 7/3/1978 .