Mo. Rev. Stat. § 86.1390: Contributions to retirement system by cities, amount.

The cities specified in sections 86.1310 to 86.1640 shall contribute to the retirement pension system such an amount as may be necessary to pay the pensions as they accrue from year to year, and such additional amounts as may be necessary to maintain the system on a sound actuarial basis as determined by the retirement board and certified as provided in section 86.1380.