The provisions of chapter 182, Laws of 1941 and the provisions of chapter 1, Laws of 1931, not hereby superseded, and of any resolution or resolutions providing for the issuance of any revenue obligations as herein set forth shall constitute a contract with the holder or holders of such revenue obligations and the agreements and covenants of the district and its commission under said acts and any such resolution or resolutions shall be enforceable by any revenue obligation holder by mandamus or any other appropriate suit or action in any court of competent jurisdiction.