I swear to God we gun owners are worse than the anti's. They have one goal, take our guns away. We seem more than willing to invent rules and problems, we complain about the RCMP doing the exact same thing. They cannot give you an ATT to do an illegal thing, transport a gun without the registration certificate, so the numbers and they do give you act as the registration until it arrives (like mentioned in the CFP Officer's Field Manual above). Fearing an uninformed officer is by no means an excuse to neuter ourselves, having the info handy to educate them is. If you are in fear, just print that blurb from the CFP Officer's Field Manual and carry it with you until your registration arrives. Geez.
No one inventing anything.
They can give you an ATT with any conditions they like, its up to you to make sure you are in compliance not theirs. The CFP is not the law and if you ATT says reg cert that is what you require. Show me anything in any act that says the TAN fulfills the reg cert requirement for ATTs.
Shawn