Aggrieved persons. Whenever a violation of this bylaw occurs or is alleged to have occurred, any aggrieved person may file a written complaint. Such complaint, stating fully the causes and basis thereof, shall be filed with the Building Commissioner. He shall record such complaint, immediately investigate, and take action thereon as provided by this bylaw, and notify the complainant in writing of any action or refusal to act, and the reasons therefor, within 14 days of receipt of such complaint. A copy of such letter, together with a copy of the written complaint, shall be forwarded to the Select Board. The decision of the Building Commissioner may be appealed to the Board of Appeals within 30 days in accordance with MGL c. 40A, §§ 8 and 15.