The new CTA 2006-C standard requires that suppliers testing their amplifiers maintain a power level of a minute or more in achieving their power output. With the earlier CEA 2006-B standard, they could hit the power level for only a few seconds, as long as they reached it.
The new standard aims to more closely replicate real-life usage of an amplifier.
It has yet to be determined if the standard will allow for self-certification or if third-party testing will be required.
Read more about the new standards here.