(a) a suit is instituted,-
(i) in an ordinary case, when the plaint is presented to the proper officer;
(ii) in the case of a pauper, when his application for leave to sue as a pauper is made; and
(iii) in the case of a claim against a company which is being wound up by the court, when the claimant first sends in his claim to the official liquidator;
(b) any claim by way of a set off or a counter claim, shall be treated as a separate suit and shall be deemed to have been instituted-
(i) in the case of a set off, on the same date as the suit in which the set off is pleaded;
(ii) in the case of a counter claim, on the date on which the counter claim is made in court;