Title 17, section 105 of the US code forbids the federal government from claiming copyright over its own publications. No such restriction exists for state governments, however, and many states have asserted copyright over things that one would think couldn’t possibly be treated as private property: legal codes, case law, the very stuff that government is made of. Worse yet, a few state governments have even awarded copyrights to 3rd party publishers in exchange for taking over the burden of printing and annotating their large, bound publications.
All that ended Monday when the Supreme Court ruled in favor of Public.Resource.Org in its case against the state of Georgia. States can no longer claim copyright over works which are authored and prepared by state employees. State publications are now unambiguously in the public domain.
Court decision: https://www.supremecourt.gov/opinions/19pdf/18-1150_7m58.pdf
The story of this case and