The FAA Order that formed the ARC was Order 1110.150
Item 4 (c) reads:
Recommendations from the Small UAS ARC will be important to us as we establish the regulatory basis allowing small UAS to operate in the National Airspace System (NAS) for compensation or hire, and clarify the definition of model aircraft.
From the ARC
RATIONALE: Reflects FAA's concept of regulating model aviation by
exempting Model Aircraft from regulation. Under this approach, modelers
participating within an aeromodeling structure/organization such as the
Academy of Model Aeronautics (AMA) may operate their Model Aircraft
in accordance with an accepted set of standards and operating
procedures. Based on a more rigorous attention to safety, risk assessment,
and risk mitigation, the accepted standards may provide greater latitude
in the Model Aircraft operations. Modelers not participating in the
additional safety programming established in an accepted set of standards
shall comply with the requirements of Section 3.