The “nothing without us” is in the preamble. It's baked into the Accessible Canada Act, which has a set of, I think, nine guiding principles that the government is supposed to be implementing across law and across policy and programming and service delivery. The preamble references, as I said, the UNCRPD—one of the specific ACA principles that laws, services, programs and policies have to be developed with the community of persons with disability—
On October 31st, 2022. See this statement in context.