The Director of Finance shall, upon the certification of the County Tax Assessor that a veteran has qualified for a disability exemption pursuant to the provisions of Section 7-208, Tax-Property Article, Annotated Code of Maryland, refund any County property taxes previously paid by the veteran on the property for any year that the veteran was qualified for the exemption. Applications for such refunds filed with the Director of Finance on or after July 1, 2003, shall be limited to refunds for the current year and the three (3) previous years. Applications for refunds filed prior to July 1, 2003, shall be limited to refunds for the current year.