Reasonable notice of the hearing shall be accorded all interested parties and shall include a statement of the time and place of the hearing. Parties shall have sufficient notice of the issues involved to afford them reasonable opportunity to prepare and present evidence and argument. If the issues cannot be fully stated in advance of the hearing, they shall be fully stated as soon as practicable. In all cases of delayed statements, or where subsequent amendment of the issues is necessary, sufficient time shall be allowed to afford all parties reasonable opportunity to prepare and present evidence and argument respecting the issues.
955 CMR, § 1.04