AI runs on electricity, which we can produce a joule directly of for much cheaper than we can produce a joule of food to feed a human on. This is a fundamental consequence of thermodynamics. It will eventually require us to ask ourselves whether we are willing to arbitrarily prioritize our own species over the cheaper to run alternative.
We human beings, however, have both the first mover advantage and a natural instinct to preserve both ourselves and our ingroup. So I don't ultimately see this law as being hard to pass. Enforcing it is another issue, but mostly also solvable issue via financial bounty systems.