Chaudhry – Tax Court of Canada indicates that the Justice website version of the ITA essentially is its official version

Bocock J roundly rejected an argument that a reassessment must be assumed to have been made without legislative authority unless the Justice lawyer has tabled an official copy of the ITA obtained from the Clerk of the Senate, as required by ss. 4 and 5 of Publication of Statutes Act. He appears to have instead found that the consolidation of the Act appearing on the Justice website constitutes an official version of the Act of which judicial notice can be taken, except potentially to the extent that a party has submitted that there is something about the consolidation that needs to be corrected pursuant to s. 31(2) of the Legislation Revision and Consolidation Act.

Neal Armstrong. Summary of Chaudhry v. The Queen, 2016 TCC 28, under General Concepts – Evidence.