Missouri Revised Statutes Title VI. County, Township and Political Subdivision Government § 70.686. Retirant becoming reemployed in the system, effect of

1. If a retirant becomes reemployed in a position covered by the system by a political subdivision from which he or she is receiving a retirement allowance, such retirant shall forfeit one monthly benefit allowance for each calendar month in which the retirant renders service in connection with such reemployment.

2. If a retirant becomes employed in a position covered by the system by a political subdivision from which he or she is not receiving a retirement allowance, such retirant shall continue to receive his or her retirement allowance during such period of employment.

3. A retirant who becomes employed by any participating political subdivision shall be considered a reemployed member with contributions due immediately in accordance with sections 70.705, 70.710, and 70.720.  Such period of employment shall be for a minimum of one year of continuous membership service before the retirant shall receive any additional allowance.

4. Any reemployed member who has one or more years of membership service after reemployment and later retires shall receive an additional allowance calculated to include only the membership service and the average compensation earned by the reemployed member since reemployment, if such employment is less than the period described in section 70.656.  In either event, the original allowance and the additional allowance, if any, shall become effective after a written application is submitted in accordance with section 70.645.

5. Notwithstanding any provision of this section to the contrary, if the retirant retired pursuant to section 70.680, the provisions of section 70.680 shall apply.