Once a bill is approved by both houses of the legislature, it becomes a law when

The correct answer is:

A two-thirds vote or greater is needed in both the House and the Senate to override the President's veto. If two-thirds of both houses of Congress vote successfully to override the veto, the bill becomes a law.

It goes to the President or Governor signs the bill into law. If the Executive takes no action, the bill becomes law in ten days.