Section 18.63 - Validation of revenue obligations(1) Notwithstanding any defects, irregularities, lack of power or failure to comply with any statute or any act of the commission, all revenue obligations issued or attempted to be issued after July 1, 1977 are declared to be valid; all instruments given after July 1, 1977 to evidence the obligation are declared to be binding, legal, valid, enforceable and incontestable in accordance with their terms; and all proceedings taken and certifications and determinations made after July 1, 1977 to authorize, issue, sell, execute, deliver or enter into the obligation or instruments are validated, ratified, approved and confirmed.(2) A determination, legislative, judicial or administrative, for any reason, that the state may not spend the proceeds of revenue obligations or that it has spent the proceeds for a purpose other than the stated purpose for which the revenue obligations were issued or for a purpose for which the state may not spend money, shall not affect the validity of the revenue obligations nor the evidence of revenue obligation therefor.