23. Persons to fill the seats in the Federal Assembly which are to be filled by representatives of commerce and industry, landholders and representatives of labour shall be chosen—
(a) in the case of a seat allotted to a Province which is to be filled by a representative of commerce and industry, by such chambers of commerce and similar associations voting in such manner as may be prescribed;
(b) in the case of a seat allotted to a Province which is to be filled by a landholder, by such persons voting in such territorial constituencies and in such manner as may be prescribed;
(c) in the case of a seat allotted to a Province which is to be filled by a representative of labour, by such organisations, or in such constituencies, and in accordance with such manner of voting as may be prescribed;
(d) in the case of one of the non-provincial seats which are to be filled by representatives of commerce and industry, by such Associated Chambers of Commerce, in the case of another such seat by such Federated Chambers of Commerce and in the case of the third such seat by such commercial bodies in Northern India, voting in each case in such manner as may be prescribed; and
(e) in the case of the non-provincial seat which is to be filled by a representative of labour, by such organisations voting in such manner as may be prescribed.