Well, there is always a PGY-2, 3, or 4 resident who is in-house for call. It may not be a system that works universally for all psychiatry programs, but it works well enough where I am, and it just so happens to be in compliance with the requirements for next year.
It sounds like you are concerned about it not being possible in your program. Keep in mind the following language that made it into the new standards (bolding added by me):
That part about "with direct supervision available" is defined above that quoted paragraph as off-site supervision. Which is what I'm inferring you do now as a PGY-1--that there is some attending availability overnight, even though the attending is not in-house.
The way I read the above paragraph is that there is wiggle-room to allow PGY-1's to take call without direct supervision immediately available as long as there is some way of measuring that an intern is competent before allowing them to do so. Those competencies haven't yet been published. If you feel it's necessary to the program's viability to require solo PGY-1 coverage in the call schedule, you may want to consider presenting your program's position to the Psychiatry RRC before the specialty-specific requirements are generated. Best of luck.