A planning obligation may not be modified or discharged except—
An agreement falling within subsection (1)(a) shall not be entered into except by an instrument executed as a deed.
A person against whom a planning obligation is enforceable may, at any time after the expiry of the relevant period, apply to the local planning authority by whom the obligation is enforceable the appropriate authority for the obligation—
In subsection (3) " the relevant period " means—
An application under subsection (3) for the modification of a planning obligation may not specify a modification imposing an obligation on any other person against whom the obligation is enforceable.
Where an application is made to an authority under subsection (3), the authority may determine—
Except in such cases as may be prescribed, the authority may not under subsection (6) discharge or modify the planning obligation if the authority considers that doing so would—
The authority shall give notice of their determination to the applicant within such period as may be prescribed.
Where an authority determine under this section that a planning obligation shall have effect subject to modifications specified in the application, the obligation as modified shall be enforceable as if it had been entered into on the date on which notice of the determination was given to the applicant.
Regulations may make provision with respect to—
Section 84 of the Law of Property Act 1925 (power to discharge or modify restrictive covenants affecting land) does not apply to a planning obligation.
In this section " the appropriate authority " means—
The Mayor of London must consult the local planning authority before exercising any function under this section.