In the relevant provisions references to work include a material change of use as defined by building regulations.
The appropriate national authority may by regulations provide that in a specified relevant provision references to work include any specified matter.
"Relevant provision" means any provision of the following—
Part 1 except sections 2(3) to (5), 20(9), 21(7), 22(2), 33(3A), 36, 37 and paragraph 1G of Schedule 1;
Part 2;
Part 2A;
sections 91ZA to 91ZD;
section 101A;
section 105C;
section 120I (3).
In this section "specified" means specified by regulations under this section.