To clarify, the BIA does not institute new leaves—the 104 weeks and 52 weeks. These were put in place in 2012. What the BIA does is eliminate the length-of-service requirements, in order for an employee to qualify for these leaves. The code currently states that employees need six months of continuous employment. This will be removed as part of the BIA, and that's what the BIA does.
On November 20th, 2018. See this statement in context.