Wherever customers decide the line should be. It's only ever about money. If people wanted to buy this the publisher would be thrilled to sell it.

There's a reason we've collectively coined the term "slop" while there's been no corresponding terminology to describe good works of AI.

>Who decides how much AI usage is permitted.

In this specific case, the publishers. More broadly, government and society at large.

book publishers who want to charge lots of money for exposure to fine new authors is absolutely a great place for a line to be drawn. not much different from concert ticketholders furious that singers were lip syncing some years back.

the whole point of art, music, and literature is that humans love to do these things. The only reason AI would be injected into these topics is for profit-driven purposes, which is a dumb purpose. The job of the robots was always supposed to be, boring, repetitive tasks. Coding, washing dishes, folding laundry. So far we have one of those three checked off.