If the legislative body intends to exercise the powers granted by this article it shall make a statement of such intention in any ordinance, resolution or order calling or providing for an election to authorize the general obligation bonds for a revenue producing facility. Such statement may be general only or it may give such detail as the legislative body may deem proper. If any such statement is made, the ordinance, resolution, order or indenture providing for the issuance of such bonds shall be substantially in accord with such statement.