Final answer:
An ordinary bill must be passed in both the lower and upper houses of the parliament and then signed by the President to become law. A presidential veto can be overridden with a two-thirds majority in both houses.
Step-by-step explanation:
Any ordinary bill needs to be passed in both the houses of the parliament, which are typically comprised of the lower house and the upper house. Once a bill has been approved by both houses, it must be presented to the President for a signature to become law. If the bill is vetoed by the President, it can still become law if repassed by a two-thirds majority in both houses. This process reflects the need for broad consensus in the law making process, ensuring that legislation represents the will of both chambers before becoming law.