In June 1945, Erina Shire resolved to investigate the reconstitution of local government on the Central Coast into two shires and following further discussions a formal proposal was presented to the Minister for Local Government, Joseph Cahill, in October 1945. Nevertheless the proposal proved divisive, with Gosford and the Wyong section of Erina Shire in favour and the rest of Erina Shire and Woy Woy Shire opposed. The formal government inquiry subsequently supported the proposal and in April 1946, Cahill notified the councils of his intention to proceed. On 1 January 1947, part of Erina Shire, all of Woy Woy Shire and the Municipality of Gosford formed Gosford Shire, and the remainder of Erina Shire north and east of Kulnura, Central Mangrove and Lisarow formed Wyong Shire.