Professional and publication fees. Each applicant shall pay all publication fees, recording fees and fees for all professionals engaged by the Historic Commission, the Planning Commission or the Zoning Board of Appeals to advise it regarding any such application. Only the fees of such professionals that are incurred for necessary time devoted to reviewing the application and all required submittals, other than time expended at regular meetings of the Historic Commission, the Planning Commission or the Zoning Board of Appeals, shall be paid by the applicant. The applicant shall also be required to reimburse any legal fees incurred by the Historic Commission, the Planning Commission or the Zoning Board of Appeals for the preparation of any legal documents required by the action of those various entities. The fee rate to be paid shall be the same rate such professionals charge the Historic Commission, the Planning Commission or the Zoning Board of Appeals for its routine services. The fees so incurred shall be paid in advance by the applicant by depositing with the City Clerk, within 10 days of notification, a sum to be estimated by the Historic Commission, the Planning Commission or the Zoning Board of Appeals at its first meeting where the application is to be considered. The actual professional fees to be charged to the applicant shall be charged against said sum and any unused portion thereof shall be returned to the applicant upon completion of action by the entities. In the event that said estimated fees are not paid when due, the application shall be denied at the next regularly scheduled meeting, unless another suitable arrangement is made with the applicant to insure payment of all fees that may be incurred. From time to time during review of the project, the professional fees may be revised and, if appropriate, an additional estimated payment may be required.