Why wouldn't they be allowed to vote on it? How does a zoning rule about gas turbines get enacted at all, except by some body noticing that it's a problem and then voting to create such an ordinance? (Or by voting not to do so, if they think it isn't actually that much of a problem or if there's a way to mitigate it or if the benefits outweigh the costs, just like with any other issue that's within the purview of the county officials?)