One Person Company eligibility: natural-person Indian-citizen requirement, single-membership and nominee restrictions, minors barred, NBFC activities prohibited. Rule 3 requires that only a natural person who is an Indian citizen may incorporate a One Person Company and act as its nominee, with residency defined by prescribed stay criteria. A person cannot be member or nominee of more than one OPC simultaneously; nomination based additional membership must be regularised within a statutory cure period. Minors are prohibited from membership or nomination and from holding beneficial share interest. OPCs are barred from being Section 8 companies and from conducting non banking financial investment activities, including investments in corporate securities.