Comment by teraflop

I don't think the second half of your comment is accurate.

Works created by the federal government have always been in the public domain, i.e. ineligible for copyright protection. The SHARE IT Act has nothing to do with that. (Of course, government works may be protected or restricted in other ways, such as classification.)

The SHARE IT Act doesn't say anything about releasing software publicly, nor does it say anything about open source licensing. It applies to software that is created by the federal government itself or by contractors It requires the source code to be made available to the government and stored in an appropriate source code repository, such that it can potentially be shared between agencies.