his appointment as Deputy House Leader of the Official Opposition. After being re-elected yet again in Wellington-Halton Hills in the 2011 provincial election, Arnott was again serving in Opposition. He was again appointed as First Deputy Chair of the Committee of the Whole House. The McGuinty Liberals had been returned with a minority Government. They were unable to pass a budget without the support or abstention of the New Democratic Party Caucus, which caused great uncertainty and speculation as to when the Government might fall. In 2013, Dalton McGuinty resigned as Premier, and was succeeded by Kathleen Wynne. After New Democratic Party Leader Andrea Horwath announced her party would vote against the 2014 Liberal Budget, Kathleen Wynne called a provincial election for June 12, 2014. Even though the PC Party ran a poor campaign province-wide, Arnott was re-elected in Wellington-Halton Hills by a comfortable margin. Once again, he was appointed First Deputy Chair of the Committee of the Whole House. He was named PC Critic to the Minister of Economic Development, Employment, and Infrastructure, and also served as PC Critic to the Minister of Labour. In February 2017, he was named PC Critic to the Minister of the Environment and Climate Change. Over the years, he has introduced many Private Member's Bills and Resolutions which have been passed by the Legislature or been adopted as Government Policy. A partial list of his legislative accomplishments includes his amendment to the Highway Traffic Act allowing volunteer firefighters to use a flashing green light on their personal vehicles when responding to an emergency. His resolution highlighting the Healthy Babies, Healthy Children program led to a 500 percent increase in its budget, allowing "at risk" children to be identified and receive the needed supports to reach their full potential. His amendment to the Workplace Safety and Insurance Board Act to allow municipalities to purchase the highest level of coverage for their volunteer firefighters was adopted as a Government bill and was passed into law. His resolution calling attention to the diminishing contribution by the Government of Canada to Ontario's health care costs was passed by the House, leading to a new health funding agreement. His controversial bill supporting "double hatter" firefighters received more hours of debate at 3rd Reading than any other Private Member's Bill in the history of the Legislature. Working with a Liberal MPP, he introduced the very first bill in the