This Part applies where a member has pensionable service under both Part 2 and Part 3.

Where this Part applies, Parts 2 and 3 are subject to the modifications provided in this Part.

As regards a person to whom the general rule in regulation 110 (general rule: separate treatment of service etc.) or regulation 237(general rule: separate treatment of service etc.) applies, this Part shall apply separately to benefits in respect of the earlier service and the later service (as defined in regulation 109 or 236, as appropriate).