Md. Code Ann., State Pers. & Pens. § 6-203
An appointing authority may appoint an employee to a position in the skilled service, professional service, management service, or executive service only if the position has been assigned to a class in accordance with Title 4, Subtitle 2 of this article.
Added by Acts 1996, c. 347, § 1, eff. Oct. 1, 1996.