Building regulations may make provision about cases where a local authority for an area in Wales ("the relevant local authority") proposes to carry out higher-risk building work in that area.
The regulations may in particular—
The regulations may also provide, in cases where a local authority is designated as the building control authority in relation to the higher-risk building work, that the relevant local authority and the designated local authority may agree that the designated local authority is to be the building control authority in relation to any work of a prescribed description that has a prescribed connection with the higher-risk building work.
Where, as a result of regulations made by virtue of subsection (2)(c) or (3), a designated local authority is the building control authority in relation to any work, as regards that work—