Upon receipt of a petition, the Department may proceed in accordance with 220 CMR 2.04, 2.05, or 2.08 or take any other action the Department deems appropriate. The Department shall consider all relevant information presented to it before adopting, amending or repealing any regulation or issuing an advisory ruling. Any decision of the Department shall be in writing and shall be accompanied by a statement of reasons for the decision. A copy of the decision and such statement of reasons shall be served on all interested persons by personal delivery or first-class mail.
220 CMR, § 2.03