Premier of Ontario in the context of "Osgoode Hall Law School"

The Legislative Assembly of Ontario (OLA; French: Assemblée législative de l'Ontario) is the legislative chamber of the Canadian province of Ontario. Its elected members are known as Members of Provincial Parliament (MPPs). Bills passed by the Legislative Assembly are given royal assent by the lieutenant governor of Ontario to become law. Together, the Legislative Assembly and Lieutenant Governor make up the unicameral Legislature of Ontario. The assembly meets at the Ontario Legislative Building at Queen's Park in the provincial capital of Toronto.

Ontario uses a Westminster-style parliamentary government in which members are elected to the Legislative Assembly through general elections using a "first-past-the-post" system. The premier of Ontario (the province's head of government) holds office by virtue of their ability to command the confidence of the Legislative Assembly, typically sitting as an MPP themselves and lead the largest party or a coalition in the Legislative Assembly. The largest party not forming the government is known as the Official Opposition, its leader being recognized as leader of the Opposition.

The Order of Ontario (French: l'Ordre de l'Ontario) is a civilian honour for merit in the Canadian province of Ontario. Instituted in 1986 by Lieutenant Governor Lincoln Alexander, on the advice of the Cabinet under Premier David Peterson, the civilian order is administered by the Lieutenant Governor-in-Council and is intended to honour current or former Ontario residents for conspicuous achievements in any field.

The Executive Council of Ontario (French: Conseil des ministres de l'Ontario), often informally referred to as the Cabinet of Ontario (French: Cabinet de l'Ontario), is the cabinet and the executive committee of the provincial government of the Canadian province of Ontario. It comprises ministers of the Crown in right of Ontario, who are selected by the premier of Ontario (the first minister) and formally appointed by the lieutenant governor. The activities of the Government of Ontario are directed by the Executive Council.

The council serves a similar function as the Privy Council for Canada. The "Crown in right of Ontario" is the legal entity that owns government property, employs public servants, and acts in legal proceedings like criminal prosecutions. Accordingly, the cabinet exercises executive and sovereign powers within Ontario's jurisdiction in the name of the monarch "in right of Ontario". Similar to decisions of the federal cabinet, executive decisions by the Ontario cabinet are known as Order-in-Council, formally issued by in the name of the lieutenant governor, the monarch's representative in the province, on the advice of the ministers. Though the lieutenant governor does not generally attend cabinet meetings, cabinet directives are said to be ordered by the Lieutenant Governor-in-Council.

David Robert Peterson PC OOnt ECO KC (born December 28, 1943) is a Canadian lawyer and former politician who served as the 20th premier of Ontario from 1985 to 1990. He was the first Liberal officeholder in 42 years, ending the so-called Tory dynasty.