220. The plans submitted to the WM by the undertaker pursuant to this Part must be submitted to North & Mid Wales Trunk Road Agent, Unit 5 Llys Britannia, Parc Menai, Bangor, Gwynedd, LL57 4BN and streetworks@nmwtra.org.uk or such other address as the WM may from time to time appoint instead for that purpose and notify to the undertaker in writing.