The local housing authority must revoke an improvement notice if they are satisfied that the requirements of the notice have been complied with.
The local housing authority may revoke an improvement notice if—
Where an improvement notice relates to a number of hazards—
The local housing authority may vary an improvement notice—
A revocation under this section comes into force at the time when it is made.
If it is made with the agreement of the person on whom the improvement notice was served, a variation under this section comes into force at the time when it is made.
Otherwise a variation under this section does not come into force until such time (if any) as is the operative time for the purposes of this subsection under paragraph 20 of Schedule 1 (time when period for appealing expires without an appeal being made or when decision to vary is confirmed on appeal).
The power to revoke or vary an improvement notice under this section is exercisable by the authority either—