by-election PEI Green Party member Hannah Bell was elected from Charlottetown-Parkdale, marking the first time in Prince Edward Island's politics that two third-party candidates had held seats in the legislature. In the 2019 election, however, the Green Party became the new official opposition party, while the Liberals became the new third party. Thus its two-party system finally ended to become a semi-two-party system. Political parties are registered in the province, under Section 24 of the Election Act. The Progressive Conservative Party The Progressive Conservative Party of Prince Edward Island, founded in 1873, was a fully incorporated wing of the Progressive Conservative Party of Canada (and its antecedents) until the federal party was disbanded in 2003. It is not formally a part of the new Conservative Party of Canada, but the two organizations share members, and most senior provincial officials have openly stated support for the federal party. It has governed frequently, most recently from 1996 to 2007. The party is strongly of the Red Tory political tradition. In October 2011, "The Progressive Conservatives boosted their seat count from two to five," out of 27. Due to a floor crossing on October 3, 2013, followed the next day by an expulsion of an MLA, the seat total fell to three. The party won 8 seats in the 2015 election to expand its seats as the official opposition. The party won 12 seats in the 2019 election, to become the first minority government since 1893. It increased its seat count to 13 in an extension election in July 2019, then won a by-election in November 2020, to up their number to 14 seats, thus becoming a majority government. Green Party The Green Party of Prince Edward Island was founded in 2005, and ran in the 2007 election for the first time. The party received a larger proportion of the total vote than the NDP during the 2007 provincial election. In July 2012, the Green Party of PEI leader and co-founder Sharon Labchuk resigned. Darcie Lanthier served as interim leader until November 2012. At the Leadership Convention in Charlottetown, 3 November 2012, the Green Party of Prince Edward Island elected Peter Bevan-Baker as leader. Bevan-Baker was elected to the Legislature in 2015, winning the party's first seat since the party was founded. He was joined in the Legislature by Hannah Bell in a 2017 by–election. In the 2019 election, they surpassed the Liberal