(1) Airworthiness directives, or equivalent, issued by the State of manufacture and mandatory service bulletins issued by an aircraft manufacturer shall be complied with.
(2) In the interest of safety, the Authority may order that an aircraft registered in Saint Lucia or operated by a holder of an air operator certificate issued under these Regulations, aircraft engine, propeller or component shall be modified or undergo special inspections.
(3) An order pursuant to subregulation (2), shall constitute an airworthiness directive and compliance is mandatory.
(4) An owner or operator of an aircraft registered in Saint Lucia and the holder of an air operator certificate issued pursuant to these Regulations shall ensure that such owner or operator receives all airworthiness directives and mandatory service bulletins that affect his or her aircraft and that are issued by the Authority, the licensing authority in the State of manufacture or the State of design.
(5) On the issue of an applicable airworthiness directive or mandatory service bulletin the owner or operator of a Saint Lucia registered aircraft and each holder of an air operator certificate issued under these Regulations shall take such action as shall be prescribed therein and shall record the details of all actions taken in the log book and other technical records of the aircraft.
(6) Mandatory or optional repairs or modifications shall be embodied only in accordance with approved data specified and in accordance with the instructions issued by the Authority or the State of manufacture, the State of design, the type certificate holder or the manufacturer, as the case may be.
(7) All modifications or repairs carried out shall be subject to approval by the Authority in accordance with detailed drawings and other technical data adequate to define completely the proposed modification and using approved materials, parts and processes conforming to the manufacturer's specifications and in accordance with a technical assessment showing compliance with an approved design standard.