(a) All employees of the department of public safety who were subject to the civil service system at the time of their employment by the department shall remain subject to the system.
(b) Nothing in this section and §§ 14-42-410, 14-42-412, and 14-42-413 shall be so construed as to reduce any right which any member of the existing fire department or police department may have under any civil service or retirement system.