In event that the proposed amendment has been determined by the Town Board to have a potential significant effect upon the environment, as provided for in Title 6, New York Code of Rules and Regulations, Part 617 (State Environmental Quality Review Act), and an environmental impact statement must then be prepared and submitted, the applicant shall pay the reasonable fees, disbursements and/or costs incurred by the Town Engineer, the Town Planner and other specialists in the course of review of said environmental impact statement.