Party discipline

The term party discipline is used in politics in two closely related, yet distinct, meanings. In a broad sense (also known as party cohesion), the discipline is adherence of the party members at large to an agreed system of political norms and rules. In a narrow sense, most pronounced under the Westminster model, the party discipline is an obligation of the members of parliament to vote along their party's line, with few exceptions. The deviations might be countered by consequences ("whipping") that are designed to ensure the relative cohesion of members of the respective party group.