I really am not educated about the actual facts on cruise ship pollution.
Seeking to ban certain cruise ship actions (or inaction) via a single State's environmental agency seems a complete waste of taxpayer dollars. If it were successful and drove cruise ships out of all Virginia harbors, all that happens is the same pollution (assuming this is even true) would be polluting the ocean and Bay waters that still flow into Virginia. True successful regulation would require at least an East Coast effort.
DEQ is already stretched too thin to handle all the tasks it has been given. Please do not waste time on such a phantom, virtue-signaling effort.