Article I, Section 7 states that if the president fails to return a bill within 10 days (Sundays excepted) after receiving it, the bill becomes law unless ''the Congress by their Adjournment prevent'' its return. A pocket veto occurs when the president takes no action on a bill and Congress adjourns before the 10-day period expires, preventing the bill from becoming law. Unlike a regular veto, Congress cannot override a pocket veto because it has adjourned and cannot reconvene to vote. The Supreme Court addressed this power in the 1929 Pocket Veto Case, ruling a bill must be returned to the chamber while it is in session and capable of work. In 1938, Wright v. United States partially reversed this, ruling Congress could designate agents to receive veto messages when not in session. Courts have never fully clarified when an adjournment ''prevents'' the president from returning a vetoed bill. No president has used the pocket veto since George W. Bush.