The Vice-President to Be Ex-Officio Chairman of the Council of States
The Vice-President shall be ex officio Chairman of the Council of States and shall not hold any other office of profit: Provided that during any period when the Vice-President acts as President or discharges the functions of the President under article 65, he shall not perform the duties of the office of Chairman of the Council of States and shall not be entitled to any salary or allowance payable to the Chairman of the Council of States...
What this Article actually means
How it shows up in everyday life
This is why the Vice-President presides over Rajya Sabha sessions day-to-day — it's their primary, active constitutional function, quite distinct from the more occasional presidential-succession role that gets more public attention.
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Quick answers about Article 64
Does the Vice-President need any special qualification to chair the Rajya Sabha?
The text above reproduces Article 64 of the Constitution of India as amended to date, for general educational reference. It is public-domain legislative text, but we recommend cross-checking the authoritative version at legislative.gov.in or india.gov.in before relying on it for a legal matter. The explanation, examples and FAQs are general information, not legal advice — consult a qualified advocate for guidance on your specific situation.