No special permit or variance shall be granted nor any other decision made by the Board of Appeals on any petition, application or appeal, except after the publication, twice, of a public hearing notice, the first being not less than 14 days prior to the hearing, with copies to the Planning Board and other parties affected and as required by law, and after a public hearing. The hearing shall be held within 65 days from receipt of notice by the Board of such appeal, application or petition. Decisions of the Board of Appeals shall be made by vote in an open meeting within 100 days of the filing date of appeal, application or petition, shall be recorded in the office of the Town Clerk and the Planning Board together with the reasons for such decisions within 14 days, and a notice of the decision shall also be issued to the owner of the land affected and to other parties in interest and to attendees at the public hearing who have requested such notices, and recorded in the Registry of Deeds. The responsibility for recording in the Registry of Deeds is with the applicant or petitioner, and fees and all other reasonable fees and costs shall be borne by the applicant or petitioner. The required time limits may be extended by written agreement between the applicant and the Board of Appeals. A copy of such agreement shall be filed in the office of the Town Clerk. The variance is effective when the applicant or petitioner files the decision with the Registry of Deeds.