Yes. It's quite common that when income tax amendments are made, they apply as of a future date. A bill like Bill C-30, the recent budget bill, might have a number of amendments that, even though it also received royal assent on June 29, might not start to apply until a later taxation year or a later date in the future, in order to give the taxpayers and the tax administration time to respond.
On July 20th, 2021. See this statement in context.