In section 3 of the Planning (Hazardous Substances) Act 1990 (c. 10) (hazardous substances authorities other than county and county borough councils), after subsection (5B) insert—
“(5C)A joint planning board constituted under section 2(1B) of the principal Act for a united district in Wales is the hazardous substances authority for land in the united district unless subsection (4) or (5) applies.”