(1) The identifying series, known as the Personal Public Service Number (PPSN), of a Scheme member and of a member of a pre-existing public service pension scheme and of any other person in receipt of a survivor's pension or a children's pension under the Scheme or of a similar or corresponding pension under a pre-existing public service pension scheme -

(a) shall be supplied by the member or that other person to the relevant authority or other body concerned (being the authority or body that is responsible for or authorises the payment to the person of the pension or of any lump sum that relates to that pension entitlement), and

(b) may be used by that relevant authority or other body as a unique identifier -

(i) to record details in respect of the pension contributions, referable amounts and other benefits under the Scheme or a pre-existing public service pension scheme, and