52.This section provides for late applications for building warrants to be made. They can be made at any time where work for which a warrant is required has commenced, but before a completion certificate has been accepted. Under section 9(9), the version of building regulations which applies for the purposes of the late application is the version at the time of the application, not the version at the time the warrant should have been applied for. An application for a building warrant under this section does not affect any liability under section 8(2).