32.In accordance with standard arrangements when a new road is built, section 6 provides for alterations of roads authorised by the Act to be completed to the reasonable satisfaction of the roads authority, and to become maintainable by the roads authority after an initial 12 month maintenance period during which the authorised undertaker remains liable for any maintenance. This is normal practice to allow any defects that emerge once the roads are first commissioned after construction to be remedied at the expense of the authorised undertaker.