a restructure of RailCorp from July 2013 that would: establish Sydney Trains to operate services in the Sydney Metropolitan area bounded by Berowra, Richmond, Emu Plains, Macarthur and Waterfall establish NSW TrainLink to operate all other passenger services including those of CountryLink transfer capital projects and planning functions to Transport for NSW establish Transport Cleaning Services, a specialist division responsible for train cleaning establish a customer service division reduce RailCorp's function to asset owner offer voluntary redundancies to 750 management and support staff The restructure resulted in Sydney Trains and NSW Trains, which were subsidiaries of RailCorp, operating railway passenger services in New South Wales under the Sydney Trains and NSW TrainLink brands. While being subsidiaries of Railcorp, Sydney Trains and NSW Trains were not controlled entities of RailCorp, but were instead controlled by Transport for NSW. Due to the restructure, CityRail and CountryLink were also abolished. In July 2017, Sydney Trains and NSW Trains ceased to be subsidiaries of RailCorp and became standalone and independent agencies of Transport for NSW. Transition into the Transport Asset Holding Entity RailCorp was converted into a state-owned corporation and renamed Transport Asset Holding Entity (TAHE) on 1 July 2020. The new entity would continue to own assets on behalf of Transport for NSW. The Residual Transport Corporation (RTC), which was formed in July 2017, would then own assets not suitable for TAHE ownership. Corruption investigation In 2007 and 2008, RailCorp was investigated by the Independent Commission Against Corruption. In a series of seven reports released during 2008, the ICAC reported that more than $21 million in improper contracts and deals through the procurement of services in just three years. In June 2009, RailCorp terminated the contract of Vicki Coleman, its chief information officer, and it was claimed that she was at the centre of claims of dishonesty and corruption. The ICAC recommended charges against 33 people; yet by April 2012, only eight people had faced the courts. Those that received custodial sentences included Allan Michael Blackstock (4½ years) and Renea Hughes (3½ years). Youssef (Joe) Madrajat was directed to undertake community service. Further charges are expected to be laid on others, and several are still waiting for the outcome of criminal proceedings. Emergency response RailCorp maintains a statewide Emergency Response Unit. The function of this unit is to attend incidents, such as derailments. Formerly known as the State Rail Fire Service, the unit