A. Any permit shall expire unless the applicant begins construction of the works within two (2) years of the issuance of the permit by the Board. The Board may, as necessary and deemed appropriate under the circumstances, extend the time for the beginning of construction beyond the time allowed in the permit for good cause shown, such as engineering difficulty or other valid reason over which the applicant has no control.

B. If the Board does not receive a written notice of commencement of works or request to extend time within thirty (30) days after the end of the two-year period, the permit shall be deemed expired after written notice to the applicant.

C. Provided, nothing in this section shall be construed as extending the time within which the waters authorized for use must be placed to actual beneficial use as provided in the permit and Sections 105.16 through 105.18 of this title.