Section 5-407 - Resignation without notice; engaging in strike; conspiracy to obstruct operations of Department(a) No officer or member of said Fire Department, under penalty of forfeiting the salary or pay which may be due him, shall withdraw or resign, except by permission of the Mayor of the District of Columbia, unless he shall have given the said Mayor 1 month previous notice, in writing, of such intention.(b) No member of the Fire Department of the District of Columbia shall directly or indirectly engage in any strike of such Department. Upon sufficient proof to the Mayor of the District of Columbia that any member of the Fire Department of the District of Columbia has violated the provisions of this subsection, it shall be the duty of the Mayor of the District of Columbia to immediately discharge such member from the service.(c) Any member of the Fire Department of the District of Columbia who enters into a conspiracy, combination, or agreement with the purpose of substantially interfering with or obstructing the efficient conduct or operation of the Fire Department of the District of Columbia by a strike or other disturbance shall be guilty of a misdemeanor and upon conviction shall be punished by a fine of not more than $300 or by imprisonment of not more than 6 months, or by both.June 20, 1906, 34 Stat. 315, ch. 3443, § 5; Jan. 24, 1920, 41 Stat. 398, ch. 54, § 2; July 31, 1939, 53 Stat. 1143, ch. 397. Merit system, application to police officers and firefighters, see § 1-632.03. .