It shall be the duty of the Corporation to revoke any stop notice relating to any damage to any property if—
Where a stop notice has been given with respect to any damage, it shall be the duty of the Corporation to consider, initially not later than twelve months after the date on which the notice was given and subsequently at intervals not exceeding twelve months, whether to revoke it.
Where a stop notice given to any person with respect to any damage is revoked—
In subsection (1)(b) above "the relevant date", in relation to a stop notice, means—
The Secretary of State may by order substitute for the period mentioned in subsection (1)(b) above (whether as originally enacted or as previously amended under this subsection) such other period as he thinks fit.
On any occasion when in pursuance of subsection (2) above the Corporation consider whether to revoke a stop notice they shall give notice of their decision to the person to whom the stop notice was given as soon as they have made it.