Salaried Exempt employees

Can an employer require salaried exempt employees to clock in at 8am, clock out at 5 and deduct 1hr of time each day for lunch, whether you take lunch or not?
Also, can a minimum requirement be set that if you work over 4hrs per day you must clock out for lunch?
Also, can a minimum requirement be set that if you work over 4hrs per day you must clock out for lunch?
Comments
The 2nd question is also yes, unless you have a state or local ordinance that mandates something different.