(1) A candidate must be either :
- A citizen of India
- A subject of Nepal
- A subject of Bhutan
(2) Provided that a candidate belonging to categories (b), (c), (d) and (e) above shall be a person in whose favour a certificate of eligibility has been issued by the Government of India.
(3) A candidate in whose case a certificate of eligibility is necessary may be admitted to the examination but the offer of appointment will be given only after the necessary eligibility certificate has been issued to him/ her by the Government of India.