501 C.M.R. 15.05
(2) Law Enforcement Officers shall diligently safeguard their identification cards so as to prevent loss, destruction or theft.
Enforcement Officer of the Law Enforcement Agency issuing the card. A Law Enforcement Officer shall return an expiring card as soon as a new one is issued. (e) Law Enforcement Officers are responsible for applying for a new identification card whenever there is a change in the Law Enforcement Officer's name, rank or department. (f) The issuing Law Enforcement Agency shall immediately demand the return of an identification card from any Law Enforcement Officer who is suspended, terminated or out of compliance with the definition of Law Enforcement Officer, or when the officer resigns, transfers or retires. (g) Each Chief Law Enforcement Officer shall issue and enforce a Law Enforcement Agency policy and/or procedure requiring adherence with 501 CMR 15.00.