Mo. Rev. Stat. § 95.527: Additional bonds authorized for national park or plaza — election (cities over 400,000).

1. Any city having a population of four hundred thousand inhabitants or more may borrow money and issue bonds in an amount not to exceed one million five hundred thousand dollars for the purpose of providing funds to supplement the funds authorized by sections 95.510 to 95.525. Any additional funds authorized hereunder shall be expended as provided by ordinance, and the ordinance shall provide the extent, if any, to which any expenditure shall be conditioned upon the expenditures of additional funds for improvements to be made by the United States.

2. The submission of the question may be ordered by ordinance without a petition therefor, and all bonds issued under the provisions of this section are subject to all limitations, terms and provisions of law applicable to the issuance and sale of general obligation bonds of the city.