There are published guidelines within the agency, your recruiting human capital person or hiring manager could tell you more.

There’s no negotiation though, either the billet is part of the program (CISA calls their CTMS) or it’s not, and either you check the box (usually with a certification) or you don’t.

Edit: found this on their site.

https://dhscs.usajobs.gov/assets/pdf/Career_Level_Guide.pdf