capability level of air ambulances. Such report shall include analysis and recommendations, as appropriate, to Congress regarding each of the following with respect to air ambulance services: (1) Qualifications of different clinical capability levels and tiering of such levels. (2) Patient safety and quality standards. (3) Options for improving service reliability during poor weather, night conditions, or other adverse conditions. (4) Differences between air ambulance vehicle types, services, and technologies, and other flight capability standards, and the impact of such differences on patient safety. (5) Clinical triage criteria for air ambulances. (h) Definitions In this section, the terms group health plan , health insurance coverage , and health insurance issuer have the meanings given such terms in section 2791 of the Public Health Service Act ( 42 U.S.C. 300gg–91 ). 11. GAO report on effects of legislation Not later than 2 years after the date of the enactment of this Act, the Comptroller General of the United States shall submit to Congress a report summarizing the effects of the provisions of this Act, including the amendments made by such provisions, on changes during such period in health care provider networks of group health plans and health insurance coverage offered by a health insurance issuer in the group or individual market, in fee schedules and amounts for health care services, and to contracted rates under such plans or coverage. Such report shall— (1) to the extent practicable, sample a statistically significant group of national health care providers