Here's the requirement:
Division III — Aircraft Maintenance Requirements
Aircraft Maintenance — General
- 605.84 (1) Subject to subsections (3) and (4), no person shall conduct a take-off or permit a take-off to be conducted in an aircraft that is in the legal custody and control of the person, other than an aircraft operated under a special certificate of airworthiness in the owner-maintenance or amateur-built classification, unless the aircraft
- (a) is maintained in accordance with any airworthiness limitations applicable to the aircraft type design;
- (b) meets the requirements of any airworthiness directive issued under section 521.427; and
- (c) except as provided in subsection (2), meets the requirements of any notices that are equivalent to airworthiness directives and that are issued by
- (i) the competent authority of the foreign state that, at the time the notice was issued, is responsible for the type certification of the aircraft, engine, propeller or appliance, or
- (ii) for an aeronautical product in respect of which no type certificate has been issued, the competent authority of the foreign state that manufactured the aeronautical product.
Note the absence of any mention of Service Bulletins.
An equivalent to an airworthiness directive is not an SB. Other countries might call ADs something else, but they're still not SBs. If SBs were mandatory in Canada, most of us mechanics and Directors of Maintenance would be in jail.