You may find the scrappers signed a purchase contract similar to the one used by P&O when selling the Canberra. I quote from the Canberra's website (www.sscanberra.com
):- P&O's insistence that Canberra never sail again was highlighted within the bill of sale itself. The breakers, who paid $5,640,818 for the ship, signed a contract with the following macabre clause:
"ownership of the propellers shall not pass until blades have been cut and removed from the vessel and ownership of the boiler, turbine-generators and propulsion motors shall not pass until the vessel is cut up to the extent that it is not practicable to rebuild the vessel"