Amendments to this chapter shall be made in accordance with §§ 7-706 and 7-708 of the Village Law and §§ 239-l and 239-m of the General Municipal Law, if applicable, after referral to and report by the Zoning Board of Appeals. If the Zoning Board of Appeals shall fail to file a report with the Village Board within 30 days after referral, it shall be deemed that the Zoning Board of Appeals has approved such proposed amendment.