The Interac Association does operate independently and they have members that are financial institutions. But it's also interesting to remember in terms of how the system actually works. If you go to your own bank and you withdraw cash from an ABM from your own bank, they are not connecting to a broader network. They're servicing you through their own proprietary network. But yes, the connection between the various ABMs, the network that exists, is through the Interac Association.
On February 15th, 2007. See this statement in context.