4

This paragraph applies in relation to a building where—

a

building work is undertaken in respect of that building (“relevant work”), and

b

Part L of Schedule 1 imposes a requirement in respect of the relevant work.

5

Notwithstanding paragraph (3), upon completion of the relevant work, any building to which paragraph (4) applies must—

a

comply with Part F of Schedule 1, or

b

where the building did not comply with Part F of Schedule 1 before the relevant work was begun, be no more unsatisfactory in relation to it than before the work was begun.