After January 1, 1954, or two years after a retirement system established by this chapter becomes operative, whichever is later, a sheriff who is a safety member and not elective, and an undersheriff, who is a safety member shall be retired as of the first day of the calendar month next succeeding that in which he or she attains age 70.

The marshal appointed to serve the superior court within the county who is a safety member shall be retired as of the first day of the calendar month next succeeding that in which he or

she attains age 65.

In San Bernardino County, a sheriff’s inspector, a chief inspector in a sheriff’s office, or a chief deputy in a sheriff’s office, who is a safety member and whose primary duties are administrative, shall be retired as of the first day of the calendar month next succeeding that in which the person attains age 70.

This section shall not be operative in any county until such time as the board of supervisors shall, by resolution adopted by a majority vote, make this section applicable in the county.