I just did this, but it was murky. I bought the car in Indiana, my parent's drove it from Indiana to Washington State (Bellis Fair) I met them there and imported it over the pacific border crossing.

ICBC will sell you a binder, but that's insurance only. ICBC requires that the car carries legal registration in the state where you are driving it. ICBC will tell you that they require you to get a registration for every state you pass through but that's preposterous, and technically impossible since the moment you cross a border there obviously won't be a motor vehicle branch there.

In my case, Indiana gladly sold my dad a temporary operting permit (with a power of attorney form from me) which was good for 30 days and for all 50 states. Every state is different though, but every state will sell you a temp permit. I believe I was justified in saying that my indiana permit satisfied ICBC requirements, although I didn't ask because ICBC would probably say no (the safe answer) and then I'd be on record. Let's face it, it is technically *impossible* to satisfy the letter of the ICBC requirements to buy a permit for every state you pass through. The back of the binder form says only that the car needs to be legally registered.

I (my dad) had paperwork showing I was out of state (out of country of course) so I paid no tax. No questions asked.

The trip over the border was uneventful, just have all your peperwork in order. The ICBC binder is good for a maximum ten days, but once you are over the border you have only 24 hours of insurance left regardless of how far you are into the ten day period.

Hope that helps!