(a) during the holder's continuous service as a peace officer; and
(b) for two years after the date of the commencement of an interruption in such service where the holder had, immediately prior to such interruption, served as a peace officer for less than two consecutive years; or
(c) for four years after the date of the commencement of an interruption in such service where the holder had, immediately prior to such interruption, served as a peace officer for two consecutive years or longer. As used in this subdivision, the term "interruption" shall mean a period of separation from employment as a peace officer by reason of such officer's leave of absence, resignation or removal, other than removal for cause.