To determine what Floor Flatness and Levelness that is designed for your project
With electronic files it might look like something below, pending the type of job you could have a big or small spec book.
Click on the Div 03 spec.
Once you open or click on the Div 03 spec, it will have multiple sections.
You want to find the Execution section.
You might see multiple sections with FF/FL numbers under the different floor finishes ( trowel finish, float finish or slab on grade, slab on metal deck etc.) Look through the sections to find the finish type you are needing.