Although still live at the conclusion of the 40th Parliament, the Bill was stalled by the Labor Government who, in spite of a substantial petition in favour of legalisation,[7] refused to support the legislation.

He was appointed as the WA spokesperson[8] for Legalise Vaping Australia in July 2018, and the Parliamentary Select Committee he chaired later that year looking into nanny state laws received considerable evidence on vaping as a potential quitting aid for those who currently smoke.

In November 2020, Stonehouse tabled one of the largest petitions received in the 40th Parliament, totalling 7176 signatures,[9] calling for amendments to the Tobacco Control Act 2006 (WA), to legalise the sale of vaping devices in Western Australia, alongside amendments to the Medicines and Poisons Act 2014 (WA), to allow for the sale and use of nicotine in such devices.

[citation needed] An advocate of free market economics, Stonehouse is on the record as stating that he would "not vote for increases in taxes, or new laws that add to the burden of regulation".

[10] In late 2020, the Liberal Democrats WA endorsed Stonehouse to defend his seat as their lead candidate in the South Metropolitan Region at the March 2021 election.