1. Subject to paragraphs 3 and 4 of this Schedule, where in the agreements set out in the Schedules to the Orders in Council and Orders made by the Secretary of State specified in Schedule 2 there are references to a retirement pension, an old age pension, a pension for old age, a basic retirement pension or a basic old age pension (or any equivalent terms) under the legislation of the United Kingdom, such references shall be altered to include a reference to a state pension under Part 1 (state pension) of the Pensions Act (Northern Ireland) 2015.