All bills passed by the parliament can become laws only after receiving the assent of the president per . After a bill is presented to him, the president shall declare either that he assents to the Bill, or that he withholds his assent from it. As a third option, he can return a bill to parliament, if it is not a money bill, for reconsideration. President may be of the view that a particular bill passed under the legislative powers of parliament is violating the constitution, he can send back the bill with his recommendation to pass the bill under the constituent powers of parliament following the procedure. When, after reconsideration, the bill is passed accordingly and presented to the president, with or without amendments, the president cannot withhold his assent from it. The president can also withhold his assent to a bill when it is initially presented to him (rather than return it to parliament) thereby exercising a pocket veto on the advice of prime minister or council of ministers per if it is inconsistent to the constitution. Article 143 gave power to the president to consult the supreme court about the constitutional validity of an issue. The president shall assent to constitutional amendment bills without power to withhold the bills per .