; and (4) may enact reasonable regulations to further the health or safety of a woman seeking to terminate a pregnancy, unless such regulations impose an undue burden pursuant to paragraph (2). (c) Rule of construction Nothing in this Act shall be construed to have any effect on laws regarding conscience protection. 5. Enforcement The Attorney General of the United States or any person adversely affected by State laws passed in contravention of this Act may seek injunctive relief in a Federal district or State court. In any action or proceeding under this section, the court, in its discretion, may allow the prevailing party, other than the United States, a reasonable attorney’s fee as part of the costs. 6. Definitions (a) In general In this Act: (1) Fetal viability The term fetal viability means the time at which, in the appropriate medical judgment of the attending health care practitioner or practitioners, there is a realistic possibility of maintaining and nourishing a life outside the womb. (2) Reasonable The term reasonable with respect to a regulation referred to in paragraph (4) of section 4(b), means that the regulation is consistent with the essential holdings of the cases referred to in section 2. (3) State The term State includes the District of Columbia, the Commonwealth of Puerto Rico, and each other territory or possession of the United States, and any subdivision of any of the foregoing. (b) Undue burden For purposes of this Act, an undue burden shall be deemed to exist, and the related provision of law shall be invalid under section 4, if the purpose or effect of such law is to place a substantial obstacle in the path of a woman seeking to terminate a pregnancy before fetal viability. 7. Severability If any provision of this Act, or the application of such provision to any person or circumstance is held to be invalid, the remainder of this Act and the application of the provisions of such to any person or circumstance shall not be affected thereby.