CAO 40.2.1 para 8.3 only refers to the need for 5 hours night command time when going for an initial issue of a CIR - " except for those persons whose licence is restricted to day only operations, 10 hours night flight of which not less than 5 hours shall be as PIC on the category of aircraft for which the rating is sought."
What is your status, do you currently hold a command instrument rating? If you do and there is no "daylight ops" restriction, you would have already met the requirement.