4. The old cases Regulations, that is to say the Regulations set out in Part I of Schedule 2 hereto, shall, subject to the amendment contained in Part II of that Schedule, continue to apply in the case of an award or payment to or in respect of, or relating to—
(a)a person who retired or otherwise ceased to be a member of a police force before 1st April 1972, or
(b)a person, being a serviceman who did not resume service as a regular policeman, whose period of relevant service in the armed forces ended before 1st April 1972,
including an award on the death of such a person on or after the said date.