Md. Code, State Personnel and Pensions § 7–502

(a) An employee subject to this subtitle shall receive the following written performance appraisals at 6–month intervals based on the employee’s entry–on–duty date:

(1) an informal mid–year performance appraisal; and

(2) an end–of–year performance appraisal with an overall performance rating in accordance with § 7–503 of this subtitle.

(b) An employee’s performance may be rated on a performance appraisal as follows:

(1) outstanding;

(2) satisfactory; or

(3) unsatisfactory.