Regulation (EU) 2018/1139 of the European Parliament and of the Council of 4 July 2018 on common rules in the field of civil aviation and establishing a European Union Aviation Safety Agency, and amending Regulations (EC) No 2111/2005, (EC) No 1008/2008, (EU) No 996/2010, (EU) No 376/2014 and Directives 2014/30/EU and 2014/53/EU of the European Parliament and of the Council, and repealing Regulations (EC) No 552/2004 and (EC) No 216/2008 of the European Parliament and of the Council and Council Regulation (EEC) No 3922/91 (Text with EEA relevance) (c. 1139)

ANNEX IX U.K. Essential requirements for unmanned aircraft

2. ADDITIONAL ESSENTIAL REQUIREMENTS FOR THE DESIGN, PRODUCTION, MAINTENANCE AND OPERATION OF UNMANNED AIRCRAFT REFERRED TO ARTICLE 56(1) AND (5) U.K.

2.1. Airworthiness U.K.

2.1.4. Unmanned aircraft and their engines, propellers, parts, non-installed equipment, and equipment to control the unmanned aircraft remotely must function as intended under any foreseeable operating conditions, throughout, and sufficiently beyond, the operation for which the aircraft was designed. U.K.