A. 
An affirmative vote of at least four members of the Board shall be necessary to approve an application for a variance, special permit or site plan review amendment.
B. 
An affirmative vote of at least four members of the Board shall be necessary to override an administrative decision.
C. 
A majority vote of the Board shall be necessary for other matters.
D. 
A quorum is four members of the Board. The record shall show the vote of each member upon each question or, if absent or failing to vote, indicate such fact.
The Board shall cause minutes of the hearing to be made and shall append thereto all reports, written communications, exhibits and petitions received during or prior to such hearing. Such minutes shall be available for public inspection in the office of the Board upon their approval by the Board.
An application may be administratively withdrawn without prejudice as of right before notice has been sent to the newspaper for publication or by mail to affected persons. After notice has been sent, withdrawal of an application will be allowed without prejudice by vote of the Board unless doing so would adversely affect a party other than the applicant or would impede the Board from carrying out its duties.
Once a petition has been voted upon and the meeting adjourned, there shall be no reconsideration of a decision of the Board.
Any changes made to any approved project shall require prior written approval. The Board's policy is that revisions to any approved plans or Board decisions shall be as follows:
A. 
Designating revisions to a decision, any of the conditions of approval, or project changes as minor revisions shall require a majority vote of the Board at a public meeting. Minor modifications shall be limited to changes that do not have a material impact on the project, and do not grant any zoning relief not originally requested or approved during the public hearing. Minor modifications shall be consistent with the purpose and intent of the Zoning Bylaw.
B. 
Approval of the minor modifications shall require a vote of four members of the Board.
C. 
Major revisions resulting in substantial change on the impact of the development on municipal services or abutters shall require a new public hearing for a formal amendment to the original approval, pursuant to MGL c. 40A, §§ 9 and 11.
D. 
Field changes are minor adjustments made in the field based on actual conditions encountered during construction, such as shifting the location of a pipe or catch basin or substituting like in-kind materials. Field changes shall be permitted with written approval from the Zoning Administrator or Building Commission.