Commission Delegated Decision (EU) 2019/1764 of 14 March 2019 supplementing Regulation (EU) No 305/2011 of the European Parliament and of the Council with regard to the applicable systems to assess and verify constancy of performance of balustrade kits and railing kits intended to be used in construction works solely to prevent falls and not submitted to vertical loads from the structure (Text with EEA relevance)