Re: USS Copernicus, NCC-640 or 623?
^ If you're concerned about registry numbers, don't be. You can make them anything you want. There's no rhyme or reason to them. Whatever "Jeffries rule" may have existed, doesn't have to be binding.
"But here you are, in the ninth
Two men out and three men on
Nowhere to look but inside
Where we all respond to PRESSURE!" - Billy Joel