A private member's bill in a parliamentary system of government is a bill (proposed law) introduced into a legislature by a legislator who is not acting on behalf of the executive branch. The designation "private member's bill" is used in most Westminster System jurisdictions, in which a "private member" is any member of parliament (MP) who is not a member of the cabinet (executive). Other labels may be used for the concept in other parliamentary systems; for example, the label member's bill is used in the Scottish Parliament and in the Parliament of New Zealand. In presidential systems with a separation of the executive from the legislature, the concept does not arise since the executive cannot initiate legislation, and bills are introduced by individual legislators (or sometimes by popular initiative).