Supreme Court of Canada expanded the definition of what constituted medical marijuana to include oils, teas, brownies, etc. from its previous limitation to dried leaves, arguing "Marijuana has never gone through the regulatory approval process at Health Canada, which requires rigorous safety reviews and clinical trials with scientific evidence". When asked why the testing has not been done when people are taking medical marijuana every day, she responded, "It is not my job as Minister. If there is clinical evidence and a company decided ... to submit it to the regulatory approval process, it would be looked at. That has never happened." Leader of the Opposition Stephen Harper resigned as Conservative party leader after the party was defeated by the Liberals in the 2015 election. Ambrose, who was elected in the new riding of Sturgeon River-Parkland—essentially the suburban portion of her old riding–announced that she would run for the interim leadership of the Conservative Party. She was elected to that post on November 5, 2015—becoming the third woman to hold the post. Ambrose was the third female leader of Canada's major centre-right party. The first was former Prime Minister Kim Campbell who led Canada's now defunct Progressive Conservative Party of Canada, and the second was Deborah Grey, of the former Canadian Alliance. She is also the third woman to be Opposition Leader, after Grey and the NDP's Nycole Turmel. All three of them served in an interim capacity. Under the party constitution, as interim leader she was not eligible to run for the leadership at the subsequent Conservative Party of Canada leadership election. On November 13, 2015, Ambrose responded to the terrorist attacks in Paris committed by the Islamic State of Iraq and the Levant. Ambrose stated, "The fight against ISIS (ISIL) requires a strong humanitarian response, but also a military response ... It's important that we remain resolute and support our allies." Ambrose supports an inquiry into missing and murdered Indigenous women. In February 2017, while still a sitting MP, Ambrose introduced Private Member's Bill C-337, An Act to amend the Judges Act and the Criminal Code, also known as the JUST Act. If passed, this bill would require judges in Canada to undergo training on sexual assault law, involving education on rape myths, stereotypes about victims, and the impact of trauma on memory. The JUST Act gained widespread support from experts and victim advocacy groups and was subsequently