InvitezHere’s why it’s considered a definitive reference:
Streamline aircraft parking, servicing, and pushback procedures. Core Components of Apron Markings and Signs Apron Markings Signs Handbook
EASA’s guidance material emphasizes that apron safety lines should include elements such as wing tip clearance lines and service road boundary lines as required by parking configurations and ground facilities. Apron safety lines must be continuous in length and at least 10 cm in width. Apron Markings Signs Handbook