Just sharing with you my experience with Carway landing:
I went yesterday to Carway border
I am a visa required country, so I don't have a visa to go to USA.
At US border there is no line-up I was the only car there, he told me to go in the office and hand me a refusal sheet. and asked me to go to the Canada border.
in Canada border, he just asked me about my status, I said implied, he asked to give him work permit even though my work permit expired since March 2015.
I wait 1/2 h then called me to sign and done...
He didn't ask for nay paper.
just for people in this forum. If you are in implied status, you are allow to work at the same condition as you were before your work permit expired.