 On 10 February 2010, the Minister for Public Transport replaced Gary Thwaites, chief executive of the Transport Ticketing Authority (TTA), with Bernie Carolan, the then head of Metlink.On 1 January 2013, as the third stage of the implementation of the "Public Transport Development Authority Act 2011," Public Transport Victoria assumed the responsibilities of the TTA, which was formally abolished on 1 July 2013.Work on a replacement of the Metcard ticketing system commenced in late 2002.