It's literally in the same sentence you're quoting:
> Per 17 USC 101, the deliverables must fall within one of nine limited categories of works.
Though I'll grant you that 17 USC 101 might not be blatantly obvious, a quick Google search will reveal https://www.law.cornell.edu/uscode/text/17/101 as a source for further information.
Your point is valid. Mea culpa. What isn't obvious to me is that the produced work is only protected by copyright, not trade secret property. But my
wonder is immaterial to the practical issue as most code is copyrighted; and any arguments I would make about trade secrets or patents would be easily refutable without a long debate. Apologies and mea culpa.
> Per 17 USC 101, the deliverables must fall within one of nine limited categories of works.
Though I'll grant you that 17 USC 101 might not be blatantly obvious, a quick Google search will reveal https://www.law.cornell.edu/uscode/text/17/101 as a source for further information.