Here's the really problematic part - used instruments.
"Even if the instrument was made with Dalbergia or the other regulated woods that were acquired before January 2, 2017 - such as a used or vintage instrument - it still must be accompanied by a CITES certificate and marked pre-convention when shipping internationally.
For example, a seller in Nashville looking to ship her 2013 Martin 000-28 with East Indian rosewood back and sides to a buyer in Canada must apply for a re-export certificate, pay the application fee, receive the certificate, and include that document with the guitar when shipping.
For sellers in the United States, CITES re-export certificates must be applied for through the US Fish and Wildlife Service. You can download the application here.
Representatives of the agency have said that initial turnaround times on certificate application may be on the order of months."
I should note that the last line contains the word "initial..." which holds some promise of reduced wait times. However, who thinks the Fish & Wildlife Service is likely to get additional funding under the next administration to deal with this? Anyone? Bueller? Bueller?
And there is this attempt at peacekeeping:
"If you contact US Fish and Wildlife, please keep in mind that they did not suggest or create this regulation - the parties of the international CITES conference did. The employees of US Fish and Wildlife are trying to work with manufacturers and sellers to develop streamlined processes around this."
All I can suggest is, if you have instruments with Rosewood you should save the original receipts or any other documentation to make it possible to re-sell. OTOH, there's the option of not selling outside the US.