“officer”, with respect to an issuer or registrant, means,
(a) a chair or vice-chair of the board of directors, a chief executive officer, a chief operating officer, a chief financial officer, a president, a vice-president, a secretary, an assistant secretary, a treasurer, an assistant treasurer and a general manager,
(b) every individual who is designated as an officer under a by-law or similar authority of the registrant or issuer, and
(c) every individual who performs functions similar to those normally performed by an individual referred to in clause (a) or (b);