“Policeman” as used in this part includes members of the California Highway Patrol, state safety members of the Public Employees’ Retirement System employed by the Department of Justice, sheriffs, undersheriffs, deputy sheriffs, marshals and deputy marshals, and any other employee of a public agency other than the state or University of California in a position designated as a policeman’s position by the board for the purposes of Section 218(d)(5)(A) of the Social Security Act.