Referring to: "DECISION NO. 2003/17/RM
OF THE EXECUTIVE DIRECTOR OF THE AGENCY of 14 November 2003
on certification specifications for very light rotorcraft", which is probably not the only applicable regulation, and without reading all the amendments to: [certification specifications for very light rotorcraft](https://www.easa.europa.eu/document-library/certification-specifications/group/cs-vlr-very-light-rotorcraft#group-table), it looks like at least: CS VLR.561 General, CS VLR.625 Fitting factors, CS VLR.777 Cockpit controls, and **especially** CS VLR.785 Seats, safety belts, and harne…