Maryland State Personnel and Pensions Section 7-502
§ 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)   a mid-year performance appraisal; and
    (2)   an end-of-year performance appraisal with an overall performance rating.
  (b)   An employee's performance may be rated on a performance appraisal as follows:
    (1)   outstanding;
    (2)   exceeds standards;
    (3)   meets standards;
    (4)   needs improvement; or
    (5)   unsatisfactory.