As a regulatory body, we try to avoid commenting on the government's decisions on the compositions of boards and other regulatory bodies. Certainly we believe there should be strong representation, but we don't have a specific formula that we would advise.
In our case, when we're doing consultations, we consult regularly with groups. Whether they're national like CNIB and the Neil Squire Society or the alliance for deaf Canadians in Alberta, we see that having different points of view represented is key, because as with any Canadians, disabled Canadians have a variety of different views. It's not a monolith. The greater diversity you have, the more informed your decisions will be.
Having said that, we have no specific formula to propose.