I will answer on behalf of the association.
There are three main parts to your question. I will start by describing the makeup of the committees.
Members of the committees represent producers and refiners, who must develop and respect the standards. They also represent producers of additives. Additives are elements that are an integral part of the final standard. For example, they facilitate getting the products on the market so that the products can meet environmental performance criteria. While these are very specialized products that are manufactured in very small quantities, these producers of additives have a great interest in ensuring that the finished products respect a certain standard and that they meet performance expectations, when it comes to vehicles for example. In short, manufacturers and vendors of additives are also present.
There are also the people who are involved in the production of biofuels. This is now a requirement in many committees. These people want to be part of the committee and they also represent producers.
Governments also have a seat on the committee. The various governments do not always have the status of a voting member, but in most committees, Natural Resources Canada, Agriculture and Agri-Food Canada, and Environment Canada participate. They now use the regulation in several standards, according to the CEPA. There are also several provincial governments such as the government of B.C., Alberta, Ontario, Quebec, Nunavut, and the Northwest Territories. They regularly have to refer to their regulation standards. They also participate in the committees' deliberations.
Finally, representatives from the automotive sector also help develop the standards. For example, the standard concerning ethanol E85 was developed by a representative of General Motors on the committees.
So, we have very balanced representation. One of the strengths of the committees that deals with oil products is the fact that no individual group has more than 50% representation. This ensures that the group is diverse enough to represent producers, vendors of additives, governments, and other user groups.