The boards of regents of the state universities, the boards of trustees of the regional universities and of The Evergreen State College, the student achievement council, or the state board for community and technical colleges shall pay not more than one-half of the annual premium of any annuity or retirement income plan established under the provisions of RCW
28B.10.400. Such contribution shall not exceed ten percent of the salary of the faculty member or other employee on whose behalf the contribution is made. This contribution may be in addition to federal social security tax contributions made by the boards, if any.