A local planning authority ... may make a change to any planning permission, or any permission in principle (granted following an application to the authority), relating to land in their area if they are satisfied that the change is not material.
In deciding whether a change is material, a local planning authority must have regard to the effect of the change, together with any previous changes made under this section, on the planning permission or permission in principle as originally granted.
The power conferred by subsection (1) includes power to make a change to a planning permission —
The conditions referred to in subsection (3)(b) do not include the condition under paragraph 13 of Schedule 7A (biodiversity gain condition).
The conditions referred to in subsection (3)(b) do not include the condition under section 90B (condition relating to development progress reports in England).
The power conferred by subsection (1) may be exercised only on an application made by or on behalf of a person with an interest in the land to which the planning permission or permission in principle relates.
An application under subsection (4) to a local planning authority in England must be made in the form and manner prescribed by development order.
A development order may provide that an application under subsection (4) to a local planning authority in Wales must be made—
Subsection (7) applies in relation to an application under subsection (4) made by or on behalf of a person with an interest in some, but not all, of the land to which the planning permission or permission in principle relates.
The application may be made only in respect of so much of the planning permission or permission in principle as affects the land in which the person has an interest.
A local planning authority in England must comply with such requirements as may be prescribed by development order as to consultation and publicity in relation to the exercise of the power conferred by subsection (1).
A development order may make provision about how a local planning authority in Wales are to deal with an application under subsection (4) (including provision imposing requirements as to consultation and publicity and as to when steps specified in the order are to be taken).
For the purposes of this section as it applies in relation to Wales, a person has an interest in land only if in relation to that land (or any mineral in, on or under it) the person—