If, as of the effective date of this local law, physical natural gas and/or petroleum extraction activities are occurring in the Town, and those activities are in all respects being conducted in accordance with all applicable laws and regulations, including without limitation the possession of valid, nonrevoked permits for all matters for which permits are required, and including compliance with each, any, and all permit conditions, as are or may be required by the New York State Department of Environmental Conservation ("DEC") and/or all other applicable local, state, and federal governments, bureaus, or agencies, then and only then such activity by or on behalf of the holder of the permit(s) shall be considered a preexisting, nonconforming use and shall be allowed to continue, subject, however, to the provisions of Subsections B and C of this § 200-63.