My T gave me a print-out on all these things in my first session - it is really clear and there is no blurred lines.

You can call whenever and leave messages on her machine and she will return call if she can (no guarantees) but she starts to charge after 10min on the phone. But in a crisis she just tries to contact people / hospital etc to get you assessed and to try make sure you will be safe
I have her email and she asks me to use it. i've only used it when she has emailed me first asking for other drs details etc.
And she charges if you don't cancel appt at least 24hrs ahead of time.

I think it is best not to contact them in between appt except in emergencies (like you are about to top yourself) or for practical things like cancelling appts. They have lots of other patients and if everyone kept contacting them they would never have time for much else.