Mo. Rev. Stat. § 168.082

For the purposes of determining retirement benefits, any person who was employed as a speech implementer before August 1, 2022, that is employed in a position on or after August 28, 2023, as a speech-language pathology assistant, shall be considered a speech implementer for purposes of certification that the department of elementary and secondary education required such person to hold before August 1, 2022, and for purposes of consideration of Social Security coverage. Such person shall not be considered a speech implementer, as described in this section, when such person dies, retires, or no longer works in a speech-language pathology assistant position. The term "speech-language pathology assistant" as used in this section shall have the same meaning as such term is defined in section 345.015.