(F) Physician specializing in emergency, trauma, cardiac, or stroke. (4) Three representatives, to be appointed by the Secretary of Transportation, to represent the various segments of the air ambulance industry. (5) Additional three representatives not covered under paragraphs (1) through (4), as determined necessary and appropriate by the Secretary. (c) Consultation The advisory committee shall, as appropriate, consult with relevant experts and stakeholders not captured in (b) while conducting its review. (d) Recommendations The advisory committee shall make recommendations with respect to disclosure of charges and fees for air ambulance services and insurance coverage, consumer protection and enforcement authorities of both the Department of Transportation and State authorities, and the prevention of balance billing to consumers. The recommendations shall address, at a minimum— (1) the costs, benefits, practicability, and impact on all stakeholders of clearly distinguishing between charges for air transportation services and charges for non-air transportation services in bills and invoices, including the costs, benefits, and practicability of— (A) developing cost-allocation methodologies to separate charges for air transportation services from charges for non-air transportation services