s 172A Assurance as regards prosecution for person served with notice
(1) When, or at any time after, an enforcement notice is served on a person, the local planning authority may give the person a letter— (a) explaining that, once the enforcement notice had been issued, the authority was required to serve the notice on the person, (b) giving the person one of the following assurances— (i) that, in the circumstances as they appear to the authority, the person is not at risk of being prosecuted under section 179 in connection with the enforcement notice, or (ii) that, in the circumstances as they appear to the authority, the person is not at risk of being prosecuted under section 179 in connection with the matters relating to the enforcement notice that are specified in the letter, (c) explaining, where the person is given the assurance under paragraph (b)(ii), the respects in which the person is at risk of being prosecuted under section 179 in connection with the enforcement notice, and (d) stating that, if the authority subsequently wishes to withdraw the assurance in full or part, the authority will first give the person a letter specifying a future time for the withdrawal that will allow the person a reasonable opportunity to take any steps necessary to avoid any risk of prosecution that is to cease to be covered by the assurance. (2) At any time after a person has under subsection (1) been given a letter containing an assurance, the local planning authority may give the person a letter withdrawing the assurance (so far as not previously withdrawn) in full or part from a time specified in the letter. (3) The time specified in a letter given under subsection (2) to a person must be such as will give the person a reasonable opportunity to take any steps necessary to avoid any risk of prosecution that is to cease to be covered by the assurance. (4) Withdrawal under subsection (2) of an assurance given under subsection (1) does not withdraw the assurance so far as relating to prosecution on account of there being a time before the withdrawal when steps had not been taken or an activity had not ceased. (5) An assurance given under subsection (1) (so far as not withdrawn under subsection (2)) is binding on any person with power to prosecute an offence under section 179.