The Companies Act, 1956
278. EXCLUSION OF CERTAIN DIRECTORSHIPS FOR THE PURPOSES OF SECTION 275, 276 AND 277.
(a) a private company which is neither a subsidiary nor a holding company of a public company;
(b) an unlimited company;
(c) an association not carrying on business for profit or which prohibits the payment of a dividend;
(d) a company in which such person is only an alternate director, that is to say, a director who is only qualified to act as such during the absence or incapacity of some other director.
(2) In making the calculation aforesaid, any company referred to in clauses (a), (b) and (c) of sub-section (1) shall be excluded for a period of three months from the date on which the company cases to fall within the purview of those clauses.