If its a "no wake area" you are required to go a slow as possible to the point where your boat causes no wake BUT maintains steering capabilities. You are however allowed to cause a minor wake if your boat must maintain a higher speed for steering.
If you are in a "headway speed area" (I.E. 50' from another boat) you can go up to 6 MPH, wake or not, as long as your boat can maintain steering, if not, you can go faster but be ready to explain if stopped.
Airwaves, "headway speed areas" and "no wake areas" are not the same. Being 50' from another boat does not constitute a no wake area, it is a headway speed area. You are allowed to cause a wake in a headway speed area as long as your not exceeding 6 MPH or the minimum speed for steering capabilities.
Wow that hurt to write!
Dan