Clerks, bookkeepers, stenographers, court service officers, except in a county of the third class, as defined in Sections 28020 and 28024, and other employees who may have been appointed as deputies sheriff or deputies marshal but who do not perform the duties of any peace officers enumerated and honorary deputies sheriff or other persons holding appointments as deputies sheriff who receive no compensation therefor who do not regularly perform official duties and those whose principal duties clearly do not fall within the scope of active law enforcement, even

though such a person is subject to occasional call, or is occasionally called upon to perform duties within the scope of active law enforcement are ineligible.