Mo. Rev. Stat. § 590.010: Definitions.

As used in this chapter, the following terms mean:

(1) "Commission" , when not obviously referring to the POST commission, means a grant of authority to act as a peace officer;

(2) "Director" , the director of the Missouri department of public safety or his or her designated agent or representative;

(3) "Peace officer" , a law enforcement officer of the state or any political subdivision of the state with the power of arrest for a violation of the criminal code or declared or deemed to be a peace officer by state statute;

(4) "POST commission" , the peace officer standards and training commission;

(5) "Reserve peace officer" , a peace officer who regularly works less than thirty hours per week;

(6) "School protection officer" , an employee of a school district or charter school who has been designated as a school protection officer.