42.Under this section an authorised officer or a police constable can withdraw a fixed penalty notice if he or she determines that the offence has not been committed or that the notice should not have been issued to the person who is named in the notice. A local authority officer can only withdraw notices issued by the local authority and the police only have the power to withdraw notices issued by police constables. A fixed penalty notice might be withdrawn, for example, where it was issued to a person and it was then later discovered that the person had consent from the owner and occupier of the land (section 1(b)). Another situation where a fixed penalty notice may be withdrawn is if it transpires that there has been a mistake as to the identity of the alleged offender and the fixed penalty notice should not have been issued to the person who is named in the notice.