Just let me get my head round the issue your suggesting, you want your council to separate glass from cans etc? As I understand from working with the other end of the process this is dictated to the council by the contractor who sorts the recycling / disposes of it. However it if it got approved by the township / local council then it would probably become policy if the department who control that area can or need to implement it (see point above). Of course this may also require a consultation / trial period etc.