59. A person required by this Order to preserve any document by reason of his being the operator of an aircraft shall, if he ceases to be the operator of the aircraft, continue to preserve the document or record as if he had not ceased to be the operator, and in the event of his death the duty to preserve the document or record shall fall upon his personal representative:
Provided that if —
another person becomes the operator of the aircraft and it remains registered in Singapore he or his personal representative shall deliver to that other person upon demand the certificates of maintenance review and release to service, the log books and the weight schedule and any record made by a flight recorder and preserved in accordance with this Order which are in force or required to be preserved in respect of that aircraft;
an engine or variable pitch propeller is removed from the aircraft and installed in another aircraft operated by another person and registered in Singapore he or his personal representative shall deliver to that other person upon demand the log book relating to that engine or propeller; and
any person in respect of whom a record has been kept by him in accordance with paragraph 53(3) becomes a member of the flight crew of a public transport aircraft registered in Singapore and operated by another person he or his personal representative shall deliver those records to that other person upon demand,
and it shall be the duty of that other person to deal with the document or record delivered to him as if he were the first-mentioned operator.