5.—(1) This paragraph shall apply in the case of a child who is permanently disabled where the relevant parent (within the meaning of Regulation D5) ceased to be a member of a police force before 15th August 1983.
(2) Where this paragraph applies nothing in Regulation D5 shall preclude the grant of a child’s allowance or special gratuity if the child was permanently disabled at the date of the relevant parent’s death.
(3) Where this paragraph applies nothing in Regulation D5 shall preclude the payment of a child’s allowance if—
(a)he has not attained the age of 19 years, or
(b)he has attained the age of 19 years and has been permanently disabled throughout the period after his attaining that age or, where later, after the death of the relevant parent.