Md. Code, State Personnel and Pensions § 11–304

(a) (1) This section applies to employees on probation following a promotion or reinstatement to a position in the skilled service or professional service.

(2) This section does not apply to probationary employees in the management service.

(b) If, in the appointing authority's judgment, a probationary employee subject to this section is unable or unwilling to satisfactorily perform the duties or responsibilities of the position, the appointing authority shall:

(1) return the employee to the employee's former position if it is vacant; or

(2) demote the employee to a position comparable to the employee’s position within the appointing authority's jurisdiction.

(c) A probationary employee may appeal a demotion under this section as a disciplinary action.