Prior to Bill C-24, applicants could take the knowledge test with an interpreter. So the knowledge test was really a test of their knowledge and not necessarily of their language ability. Our submission was that requiring people to take the knowledge test in an official language amounts to a second-language test. So the proposal is just to revert to the prior system, where people could take that test with an interpreter.
On April 14th, 2016. See this statement in context.