Section 503 - Applicability; exclusions(a) Except as provided in subsection (b), this act shall apply to all gas wells which penetrate a workable coal seam in this Commonwealth, including any gas well which penetrates a workable coal seam on lands owned or administered by the Commonwealth or any political subdivision thereof.(b) This act shall not apply to any: (1) Gas well for which a permit is obtained under the Oil and Gas Conservation Law and which is, in fact, drilled to a depth which penetrates the onondaga horizon or, in those areas where the onondaga horizon is closer to the surface than 3,800 feet, penetrates deeper than 3,800 feet, even if the well is completed as a gas well which would otherwise be subject to this act; except to the extent that such gas wells are considered "other wells" for the purposes of section 7 . (2) Oil well, injection well or storage well, except to the extent that such wells are considered "other wells" for the purposes of section 7.(c) Nothing in this act shall be construed to require gas wells drilled prior to the effective date of this act to comply with the minimum distance requirements of section 7.1984, Dec. 18, P.L. 1069, No. 214, § 3, effective in 90 days.