The purpose of 807 CMR 4.00 is to establish uniform criteria and procedures to be applied by the Retirement Board in determining an individual's initial eligibility for membership within the Massachusetts Teachers' Retirement System ("MTRS"); under what circumstances a separation from service occurs; and continued membership for those who, though still members in service, no longer meet the statutory definition of "Teacher". The retirement board shall assist all public school teachers and administrators in obtaining all rights and benefits authorized by M.G.L. c. 32 while protecting the retirement system from liability not authorized by law.
807 CMR, § 4.01