(a) “Patrol member” includes all members employed in the Department of the California Highway Patrol or by a county in connection with its highway patrol function, respectively, whose principal duties consist of active law enforcement service, except those whose principal duties are those of a telephone operator, clerk, stenographer, machinist, mechanic, or otherwise clearly do not fall within the scope of active law enforcement service, even though the person is subject to occasional call, or is occasionally called upon, to perform duties within the scope of active law enforcement service.
(b) “Patrol member” does not include employees of the Department of the California Highway Patrol who are designated as peace officers by the Commissioner of the California Highway Patrol under subdivision (a) of Section 2250.1 of the Vehicle Code.