NBAA published best-practices guidelines for charter brokers that outline the regulatory environment in which air-charter brokers work, along with business-practice recommendations to benefit air-charter consumers, operators and brokers alike. While noting that air-charter brokers play an āimportant roleā for customers with on-demand, Part 135 charter providers, NBAA also points out that, unlike Part 135 operators, ābrokers are not plainly and comprehensively regulated.ā In the course of their work, brokers encounter a number of federal and state agencies that may have jurisdiction over their businesses, and NBAAās guidelines are meant to help brokers navigate regulatory requirements and develop best practices.