I just got off the phone with customs and was a little nervous. I asked if I have to cross during office hours specifically and he said yes.
To clarify, for Port Huron, that would mean M-F 8am-4:30pm?
https://www.cbp.gov/contact/ports/port-huron
On the Vehicle Import Form, it asks to check one of the options: "compliance label affixed" or "manufacturer's letter attached" where do I find or obtain either of these?