Md. Code, State Personnel and Pensions § 4-201

(a) This section does not apply to those units of State government with an independent personnel system.

(b) In the State Personnel Management System the Secretary shall:

(1) establish classes;

(2) assign a rate of pay to each class;

(3) ensure that each class comprises one or more positions:

(i) that are similar in their duties and responsibilities;

(ii) that are similar in the general qualifications required to perform those duties and responsibilities;

(iii) to which the same standards and, if required, tests of fitness can be applied; and

(iv) to which the same rates of pay can be applied;

(4) give each class a descriptive classification title;

(5) prepare a description of each class; and

(6) (i) create additional classes; and

(ii) abolish, combine, or modify existing classes.

(c) The Secretary shall:

(1) assign a class to the skilled service, professional service, management service, or executive service, as appropriate; and

(2) designate special appointment positions in the State Personnel Management System that:

(i) must be filled without regard to political affiliation, belief, or opinion; or

(ii) in accordance with § 6–405(b) of this article, may be filled with regard to political affiliation, belief, or opinion.