A core element in the work of the European Parliament lies in amending and passing EU legislation. Three procedures are used, with the most common now being the ‘ordinary legislative procedure’ (traditionally referred to as ‘co-decision’). The Parliament may also be required to give (or withhold) its consent to certain Council decisions, or may simply be consulted on certain Commission proposals. Under co-decision and consent, the EP has a right of veto over EU legal acts. The two charts below together show the rise in the use of co-decision, reflecting greater EP power from successive Treaty changes, and the growing trend for the EP and Council to agree on legislative texts at the first reading of that process.