Mo. Rev. Stat. § 36.350: Sick and annual leaves — regulations to apply to all state agencies.

The regulations shall provide for the hours of work, holidays, attendance, and leaves of absence in the various classes of positions subject to this law. They shall contain provisions for annual leave, sick leave, and special leaves of absence, with or without pay, or with reduced pay, and may allow special extended leaves for employees disabled through injury or illness arising out of their employment, and the accumulation of annual leave and sick leave. Such regulations shall apply in all state agencies.