(1) A cause of action for any building work in respect of a building accrues (a) on the date on which a certificate of occupancy in respect of thatbuilding work is issued under the Building Regulations 1994 ; or(b) if such a certificate is not issued (i) on the date of the first occupation of the building; or(ii) 2 years after the issue of the building permit relating to that building if the building is not occupied.(2) A cause of action for any plumbing work accrues (a) on the date on which a certificate of completion in respect of that plumbing work is issued under Part 2 of the Building Act; or(b) if such a certificate is not issued (i) on the date of the first use of the plumbing work; or(ii) 2 years after the issue of the plumbing permit if the plumbing work is not used.