43. The director general may grant an authorization, upon a written application of the leader of the party,(a) to a party of which at least one candidate was elected at the previous election;
(b) to a party which, at the last general election, had candidates in at least one-third of the electoral districts; or
(c) to a party which elected its leader at a convention and which undertakes to present candidates for at least one-third of the offices of councillor at the next general election.