(a) Conditions precedent. The performance or occurrence of a condition precedent in a contract need not be pleaded. A denial of performance or occurrence shall be made specifically and with particularity. In case of such denial, the party relying upon the performance or occurrence shall be required to prove on the trial only such performance or occurrence as shall have been so specified. (b) Corporate status. Where any party is a corporation, the complaint shall so state and, where known, it shall