The combined current and prior service pensions of a state safety member who on March 31, 1973, was a forestry member not subject to former Section 21252.3, as added by Chapter 131 of the Statutes of 1970, shall be determined in accordance with this part as it read and applied to him or her on March 31, 1973, and the member shall not become subject to Section 21369 or 21369.1 unless he or she thereafter accepts appointment to a position in another state department in which he or she is a state safety member, and in that event he or she shall be subject to Section

21369 or 21369.1, as applicable, with respect to all of his or her state safety service.