Md. Code, State Personnel and Pensions § 5–211

(a) An applicant or employee subject to this subtitle may file with the head of the principal unit a written complaint:

(1) that alleges a violation of § 5–208 of this subtitle; or

(2) that alleges harassment in violation of § 20–606(a)(5) of the State Government Article.

(b) A complaint under subsection (a)(1) of this section must be filed within 1 year after the complainant first knew of or reasonably should have known of the alleged violation that is the basis for the complaint.

(c) A complaint under subsection (a)(2) of this section must be filed within 2 years after the alleged violation that is the basis for the complaint.