From what I've read, a revised Loan Estimate is not required if a Rate Lock term is extended and there is no extension fee.

On the other hand, if a rate lock extension fee is charged to the borrower, a revised Loan Estimate must be issued to disclose that fee? A revised LE would need to be issued within the initial 3 days of the extension, correct? Or, we can disclose the extension fee in the Closing Disclosure (or a revised Closing Disclosure) and reset the tolerance there?

The three day rule would apply, whether that is a revised LE or the initial CD.

So, if you haven't provided the initial CD but are ready to and that same day you find out that the rate lock is going to have to be extended and there will be a fee, can that extension fee be disclosed on the initial CD instead of a re-disclosed LE to reset?

If you are within four business days of closing - yes. Unless your investor has different requirements.

Ok, thank you.