25.—(1) Nothing in this regulation shall affect the operation of section 29(3)(a) of the Interpretation Act (Northern Ireland) 1954.
(2) In this regulation, “relevant consent” means a hazardous substances consent granted before the commencement of these Regulations under which the following are expressly authorised—
(a)the presence of a category of substance listed in column 1 of Part B of Schedule 2 to the Hazardous Substances Regulations; or
(b)the presence of a substance named in column 1 of Part A of Schedule 2 to the Hazardous Substances Regulations.
(3) This regulation applies to a relevant consent where the category or substance referred to in paragraph (1)—
(a)is not contained in Schedule 2 to these Regulations; or
(b)is differently named or defined under Schedule 2 to these Regulations.
(4) Where this regulation applies references in a relevant consent to a category or substance referred to in paragraph (1) are to be interpreted as if these Regulations had not come into operation.