It's my understanding that we residents would still pay sales tax re an a/c purchase; but the non-Maine residents who purchased an a/c and, perhaps, paid no sales tax will now be safe from being hit with the prior regulation re sales tax. And there will be no sales tax on aircraft parts required for servicing of a/c.
Yes; and I suspect that if I went to NH(no sales tax) and bought a plane, as a resident of Maine I'd be responsible for Maine sales tax upon registering said purchase.
HR