My T once said he usually contracts with sui people but he wouldn't insult my intelligence by trying to do that. "Just call me if it gets bad, ok?" That's what he said. In essence it's like a contract, it give me the green light to call. I don't have to think "should I call" "will I bother him" "maybe email instead"...etc. It's leaves me in a "I am supposed to call" frame of mind which makes it easier to reach out.