The normal rate of contribution for any member whose retirement allowance is determined under Section 21366, and who after December 1, 1968, enters that membership or enters employment more than one year after termination of employment in which he or she was subject to Section 21366, shall be the rate, specified in the schedule established by the board in accordance with this chapter as it read on November 30, 1968, and in effect on that date for that formula and benefit percentage, for the age at his or her birthday nearest to the date of his or her earliest service subject to any of those sections, whether or not contributions for that service were withdrawn or redeposited, increased by the number of completed years of his or her absence from any employment subject to any of such sections, except that on and after January 1, 1977, female rates shall be adjusted to conform with male rates.