Under section 42 of the Constitution of Queensland the Premier and other members of Cabinet are appointed by the Governor and are collectively responsible to Parliament. The text of the Constitution assigns to the Premier certain powers, such as the power to assign roles (s. 25) to Assistant Ministers (formerly known as Parliamentary Secretaries), and to appoint Ministers as acting Ministers (s. 45) for a period of 14 days.
In practice, under the conventions of the Westminster System followed in Queensland, the Premier's power is derived from two sources: command of a majority in the Legislative Assembly, and the Premier's role as chair of Cabinet, determining the appointment and roles of Ministers. Although ministerial appointments are the prerogative of the Governor of Queensland, in normal circumstances the Governor will make these appointments under the "advice" (in reality, direction) of the Premier.
Immediately following an election for the Legislative Assembly, the Governor will call on the leader of the party which commands a majority in the Legislative Assembly, and ask them to commission a government. A re-elected government will be resworn, with adjustments to the ministry as determined by the Premier.
The Premier has an office in the Executive Annexe of Parliament House, Brisbane, which is normally used while Parliament is sitting. At other times the Premier's ministerial office is in the Executive Building a short distance down George Street.
Before the 1890s, there was no developed party system in Queensland. Political affiliation labels before that time indicate a general tendency only. Before the end of the first decade of the twentieth century, political parties were more akin to parliamentary factions, and were fluid, informal and disorganised by modern standards.