The constitution designates the Parliament of India as the legislative branch to oversee the operation of the government. India's bicameral parliament consists of the Rajya Sabha (Council of States) and the Lok Sabha (House of the People). The Council of Ministers is held responsible to the Lok Sabha.
The government can enact laws and ordinances as required for the governance of the country. However, laws and ordinances have to be passed by the legislative branch in order to be effected. Parliament sessions are conducted to discuss, analyze and pass the laws tabled as Acts. Any law is first proposed as a bill in the lower house. If the lower house approves the bill in current form, the bill is then proposed to be enacted in the upper house. If not, the bill is sent for amendment and then tabled again so as to be passed as an Act. Even if the bill is passed in the lower house, the upper house has the right to reject the proposed bill and send it back to the government for amending the bill. Therefore, it can be said that the governance of India takes place under two processes; the executive process and the legislative process. Ideally, the governance cannot be done through the individual processes alone. After the Bill is passed by both the houses, the President signs the Bill as an Act. Thus the legislative branch also acts under the name of the President, like the executive branch.
Ordinances are laws that are passed in lieu of Acts, when the parliament is not in session. When the parliament is in recess, the President assumes the legislative powers of both the houses temporarily, under Part V: Chapter III - Article 335 of the Constitution of India. The government has to propose a law to the President during such periods. If the President is fully satisfied with the bill, and signs the bill, it becomes an ordinance. The powers of ordinances are temporary, and each ordinance has to be tabled in the parliament when the houses reassemble. The President also has the right to withdraw an ordinance.