What would make you think that a word in the English language could be in the gift of a government department? Any company can apply whatever titles that it wishes to its employees, as long as the actual words chosen do not imply an unwarranted medical, academic or similar qualification/earned entitlement.
If a hotel wishes to call its doorkeepers Petty Officers, Sergeants, Marshals or Commissionaires, that is a matter for them, not the government of the day.
Never regret growing older. It is a privilege denied to many. Don't worry about old age - it doesn't last.