Md. Code, Educ. § 6-904

(a) (1) Any public school employee who is subject to a personnel action in violation of § 6–902 of this subtitle may file an administrative complaint with a public school employer. (2) A public school employer shall: (i) Provide an administrative remedial process for a public school employee who files an administrative complaint under paragraph (1) of this subsection; and (ii) Complete the administrative remedial process under item (i) of this paragraph within 30 days after a public school employee files an initial administrative complaint. (b) (1) Before instituting a civil action, a public school employee who is subject to a personnel action in violation of § 6–902 of this subtitle shall notify the local superintendent in writing of the employee’s intention to institute a civil action. (2) Subject to paragraph (1) of this subsection, any public school employee who is subject to a personnel action in violation of § 6–902 of this subtitle may institute a civil action in the county where: (i) The alleged violation occurred; (ii) The employee resides; or (iii) The public school employer maintains its principal offices in the State. (3) The action shall be brought within 9 months after the alleged violation of § 6–902 of this subtitle occurred, or within 9 months after the public school employee first became aware of the alleged violation of § 6–902 of this subtitle.