13. (1) Notwithstanding anything contained in any other law for the time being in force or in the articles or memorandum of association of any trade organisation or other company or in any agreement or other instrument, the Government may,-(a) subject to any rules made in this behalf, by order in writing, direct any person, partnership firm, company or other concern engaged in any trade, commerce or industry to be a member of a registered trade organisation specified in the order; or(b) if it consider expedient in the interest of trade, commerce or industry, by notification in the official Gazette, direct all such persons, firms, companies or concerns or any class thereof engaged in trade, commerce or industry as may be specified in the notification subject to exception, if any, to be members of the registered trade organisation or organisations specified in this behalf in such notification. (2) Upon the issue of an order or notification under sub-section (1) the registered trade organisation concerned shall admit as its member any person, firm, company or concern directed to be its member by such order or notification.