How does company policy relate to the legal floor for pay protection concerning exempt employees leaving early?

Answer

Company policy sets the ceiling for acceptable behavior, even if pay cannot be legally reduced.

The legal landscape sets a floor for pay protection, but company policy sets the ceiling for acceptable behavior; an employer can discipline an employee for failing to adhere to established work schedules even if their pay is untouched.

How does company policy relate to the legal floor for pay protection concerning exempt employees leaving early?
jobsalarytimeLawemployee