Each State shall establish 1 or more rating areas within that State for purposes of applying the requirements of this subchapter.
The Secretary shall review the rating areas established by each State under subparagraph (A) to ensure the adequacy of such areas for purposes of carrying out the requirements of this subchapter. If the Secretary determines a State’s rating areas are not adequate, or that a State does not establish such areas, the Secretary may establish rating areas for that State.
The Secretary, in consultation with the National Association of Insurance Commissioners, shall define the permissible age bands for rating purposes under paragraph (1)(A)(iii).
With respect to family coverage under a group health plan or health insurance coverage, the rating variations permitted under clauses (iii) and (iv) of paragraph (1)(A) shall be applied based on the portion of the premium that is attributable to each family member covered under the plan or coverage.
If a State permits health insurance issuers that offer coverage in the large group market in the State to offer such coverage through the State Exchange (as provided for under section 18032(f)(2)(B) of this title), the provisions of this subsection shall apply to all coverage offered in such market (other than self-insured group health plans offered in such market) in the State.