18(1)If, immediately before the appointed day, approved work is proposed to be carried out by or on behalf of a Crown authority (whether or not in relation to a Crown building) the fact that, on or after the appointed day, the work may be carried out by or on behalf of a health service body or an NHS trust shall not prevent it continuing to be regarded for the purposes of Part I of the Building Act 1984 as work carried out by a Crown authority.E+W+S
(2)Subject to sub-paragraph (3) below, expressions used in sub-paragraph (1) above have the same meaning as in section 44 of the Building Act 1984 (application of Part I to Crown).
(3)Any reference in sub-paragraph (1) above to approved work is a reference to work in respect of which, before the appointed day, either a contract for carrying it out was entered into or all necessary design certificates were signed in accordance with arrangements relating to compliance with the substantive requirements of building regulations by Regional and District Health Authorities and certain Special Health Authorities.