The combined current and prior service pensions for a state safety member who on March 31, 1973, was a warden member shall be determined in accordance with this part as it read and applied to him or her on March 31, 1973, if on March 31, 1973, he or she was either:

she entered warden service after attaining the age of 35 years, unless he or she elects in writing to be subject to Section 21369 and the election is filed in the office of the board within 30 calendar days following April 1, 1973.

Any member who thereafter accepts an appointment to a position in another state department in which he or she is a state safety member shall become subject to Section 21369 or 21369.1, as applicable, with respect to all of his or her state safety service.