760 CMR, § 25.03
Applications for approval of changes to an approved M.G.L. c. 121A shall be signed by a duly authorized officer of the M.G.L. c. 121A entity and specify in detail the changes for which approval is sought. The application for approval of a change shall reference all pertinent portions of the approved original application with any approved amendments. The city or town and the Department shall approve without a hearing a change to a project if and to the extent such change is not a material change and does not relate to matters which were required to be, or might properly have been, the subject of deliberation by the Department, by the local planning board or by the mayor or selectmen. An application for a material change shall be processed in the same manner as an original application. The Department shall determine whether a change is material.
760 CMR, § 25.03