All requests for advisory rulings will be promptly acknowledged by the department. Within ninety days after the acknowledgement, a ruling will be made or parties advised that a ruling will not be made together with the reasons therefor. Alternatively, the department may request additional information which is necessary to determine whether an advisory ruling is appropriate. All advisory rulings shall be written and entitled as such. They shall include a statement of facts or assumptions or both upon which the rulings are based.
17-229 C.M.R. ch. 101, § 03