Roberts. Later in the day, the New Zealand Department of Internal Affairs and the Crown Law Office confirmed that Joyce was indeed a New Zealand citizen. He quickly renounced his New Zealand citizenship. On 27 October 2017, the High Court ruled that Joyce had been ineligible to be a candidate for the House of Representatives at the time of the 2016 election, since he had been a dual citizen at that time, and that his election was therefore invalid. The ruling cast doubt on the validity of ministerial decisions made after August 2017. On 2 December 2017, Joyce won the ensuing New England by-election with a healthy two-party swing of 7.5 percent, in the process winning almost two-thirds of the primary vote. He was sworn back into the House four days later, and on the same day was reappointed as Deputy Prime Minister as well as Minister for Agriculture and Water Resources. Prime Minister Turnbull had taken on that portfolio himself after Joyce was forced out of Parliament for the first time. On 20 December 2017, in a rearrangement of the Second Turnbull Ministry, Joyce was appointed as the Minister for Infrastructure and Transport. During the by-election for New England, Gina Rinehart awarded Joyce the first "National Agricultural and Related Industries prize", worth $40,000. This was criticised by Labor, and Joyce's office later said that he would "politely decline" the money. Affair On 7 December 2017, Joyce announced that he had separated from his wife. On 6 February 2018 The Daily Telegraph reported that he was expecting a child with his former communications staffer Vikki Campion. Richard Di Natale of the Greens called on Joyce to resign for "clearly breaching the standards required of ministers". Prime Minister Malcolm Turnbull publicly called for Joyce to "consider his own position." This was as much as Turnbull could do under the Coalition agreement, which stipulates that the leader of the Nationals automatically becomes Deputy Prime Minister during periods of Coalition government. Turnbull could not have sacked Joyce unless he was deposed in a National leadership spill. However, Turnbull forced Joyce to go on a week of personal leave instead of acting as prime minister while Turnbull visited the United States. He also announced that the parliamentary code of conduct would be reworded to forbid sexual relationships between ministers and their staff. On 21 February, Turnbull ordered an investigation into whether Joyce had breached