(c) Court Interpretation In reviewing action initiated by the applicable secondary State authority, the court of competent jurisdiction shall apply the covered laws of the primary State. (d) Notice of Compliance Failure In the case of individual health insurance coverage offered in a secondary State that fails to comply with the covered laws of the primary State, the applicable State authority of the secondary State may notify the applicable State authority of the primary State. . (b) Effective Date The amendment made by subsection (a) shall apply to individual health insurance coverage offered, issued, or sold on or after October 1, 2018. (c) GAO Ongoing Study and Reports (1) Study The Comptroller General of the United States shall conduct an ongoing study concerning the effect of the amendment made by subsection (a) on— (A) the number of uninsured and under-insured