239 CMR, § 3.15
Any interested person or his or her attorney may at any time request an advisory ruling with respect to the applicability to any person, property or factual situation of any statute or regulation enforced or administered by the Board. The request shall be addressed to the Board and sent to the secretary by certified mail or delivered in person. All requests shall be signed by the person making it or his or her attorney, contain his or her address or the address of his or her attorney, and state clearly and concisely the substance or nature of the request. The request may be accompanied by any supporting data, views or arguments. Upon receipt of the request, the Board shall consider it and render its opinion in writing. The Board may at any time rescind an advisory ruling. When an advisory ruling is rendered, a copy of the ruling shall be sent to the person requesting it or his or her attorney.
239 CMR, § 3.15