I think it is less now than it was but was one of the reasons why the Building Code for Canada required accessible stalls in the men's and women's bathrooms but did not require the provision of unisex facilities. Many businesses baulked at putting in a third set of washrooms, due to the additional expense. Larger institutions and buildings like Malls and airports have been slowly getting on board. The CPA had a lot of articulate and educated members, many of whom had become disabled later in their lives and who may have had a different perspective as a consequence. They were also more likely to be both educated and articulate, so were the natural group that governments sought advice from when developing guidelines.

I think that over time some of their leadership became more aware of cross disability issues , so I hear that they have become less strident in their opposition and I believe their official position is to support unisex washrooms in addition to accessible single sex rooms.

Rather surprisingly one of the more effective drivers for unisex washrooms is related to accessibility for the trangendered but if it helps improve the situation who cares.