This document discusses the regulatory framework and operational usages of remotely piloted aircraft systems (RPAS). It notes that RPAS, also called drones, vary greatly in size, shape, performance, and intended usage. Regulating RPAS is challenging and requires considering factors like airworthiness, pilot qualifications, and aviation operations. The document outlines the roles of international and national regulatory bodies in developing RPAS standards and rules. It acknowledges there is currently no harmonized regulatory framework in Europe for small RPAS and different states have adopted different approaches. The need for common rules and technologies to safely integrate RPAS into European airspace is discussed.