The decision isn't absolutely set in stone just yet. Tonia Buell is the alternative fuels program manager at Washington State, and as reported by Reuters, she acknowledges that some additional steps are in store for the plan.
"It hasn't necessarily been tested and certified for other auto manufacturers, so we want to make sure it's going to work but we are planning to require NACS at our state-funded and federally-funded sites in the future." Of course, this only applies to companies that want to use federal funds for building new charging stations in the US. There are major incentives to do that, not the least of which being $7.5 billion available for the charging infrastructure. Federal requirements call for companies to have at least four CCS chargers per site, but no minimum for NACS plugs. The CCS requirement also applies to Tesla, should the company seek federal funds for new Supercharger locations.