Bob,
Motor limits are M class as long as you are a L3 flyer. N class and O class motors will be permitted with PRIOR APPROVAL only. The TMO Prefect reserves the right to not permit ANY motor/rocket/flight that is deemed to be unsafe or break the waiver.
The standing waiver is 18,000' Mean Sea Level (MSL) or 16,875' Above Ground Level (AGL); this applies to all commercial motors. For Research motors, the waiver is 90% of the waiver or 15,188 AGL. Please do not break the waiver or you will be banned from any future launches.
