(d)a subject of Nepal.(ii)The appointment of candidates in categories (c) and (d) referred to in sub-rule (i) shall be subject to the issue of a certificate of eligibility by the State Government in their favour. The certificate of eligibility in respect of a candidate belonging to the category (c) referred to the said sub-rule shall be valid only for a period of one year from the date of his appointment beyond which he can be retained in service only if he has become a citizen of India. Certificate of eligibility will not, however, be necessary in cases of candidates belonging to any one of the following categories :-