Rolls Royce CEB A-72-3272 refers:
The max. cont. Nr/N2 RPM is 107.2% with trainsients allowed up to 112.7 for a max. of 15 seconds. Maintenance action is required for transients of 112.7% and above for more than 15 seconds.
This is a high end restriction, added to the already steady state restriction, and is more likely to occur when in a low pitch descent manoeuvre such as an auto. Easy to do if you are doing an auto RPM check.....beware!!
The CEB is interesting reading if you can get a copy from your engineering folk