6.
—(1) A firm name may —
(a)
consist of the name or part of the name of the existing proprietor or one of the existing partners of the firm;
(b)
consist of the names or parts of the names of 2 or more of the existing proprietors or partners of the firm; and
(c)
with the approval of the Council, consist wholly or partly of the name or part of the name of any former proprietor or former partner of the firm.
(2) The name or part of the name of any existing proprietor or partner of a firm which is to constitute the name of the firm shall be in accordance with the name of such proprietor or partner as appears in his practising certificate at the time of the application under rule 4(2).