Nope, it had been approved, went through peer review (and was accepted) without a single mention of that. I was going through some system to check to see if my paper was formatted correctly when I gave up. I was told that wasn't even the system to submit the paper to.
And I've never published in EE before ... the workshop was 'Solar Astronomy Big Data', and I've only dealt with journals from solar physics, science informatics / data science, and library & information science. There's always been an exemption for work that was done on government funded time.
Their form allowed you *some* rights as it was government funded (eg, to publish it to any required repositories) but they still wanted the copyright. Even my boss (one of the workshop organizers) thought it was over-reaching.
AGU had some assinine rules that kept me from publishing in their journals (they counted posters and talks posted online as 'published', so wouldn't accept any papers from me.) ... but I also cut my ties to them this year (after having been very active with the Earth and Space Science Informatics focus group; was nominated to be secretary last year) when I realized that in their response to an RFI on public access to federally funded research, they called themselves a 'publisher' and never a 'scientific society' ... that was the last straw, as I already knew that I disagreed with just about everything in their statement.