On each application for a "d" variance filed pursuant to N.J.S.A. 40:55D-70d, the applicant shall be required to post to the professional review escrow account a minimum amount of $1,000. The applicant shall also be required to post such additional amounts into the professional review escrow account as may be deemed to be reasonably required by the Board to appropriately consider the application. The amounts required pursuant to this section shall be required to cover the costs of review of the application by the Board's engineer, planner and attorney as well as the costs of possible review, in appropriate instances, by special professionals, e.g., traffic, landscaping and environmental professionals, required to review specific aspects of the application. An applicant shall be notified in writing when additional amounts to restore the professional review escrow account shall become due and payable. Prior to withdrawal of any funds from this professional review escrow account, an invoice shall be submitted to the Board Chairperson or his/her designee, and simultaneously therewith to the applicant, setting forth the work performed for which such fees are being requested. Following conclusion of the hearings and meeting regarding the application, any unused portion of this professional review escrow account shall be refunded to the applicant simultaneously with payment of the Board's professional(s). Upon reimbursement of any unused funds, an applicant may request an accounting of expended funds, and the same will be provided to the applicant within 30 days of a written request filed with the Board.