http://www.legislation.gov.uk/id/nisr/2012/453

SCHEDULES

SCHEDULE 1ACTIVITIES, INSTALLATIONS AND MOBILE PLANT

PART 3INTERPRETATION OF “PART A INSTALLATION” ETC.

12.

For the purpose of these Regulations—

“Part A installation” means an installation where a Part A activity is carried out (including such an installation where a Part B or Part C activity is also carried out);

“Part B installation” means an installation where a Part B activity is carried out, not being a Part A installation (including such an installation where a Part C activity is also carried out);

“Part C installation” means an installation where a Part C activity is carried out, not being a Part A installation or Part B installation.