Enhancement Request (ER) Bug 4061138 - SUPPORT FOR CONTINUOUS PRICE BREAKS brought about the continuous price break functionality.
This functionality is also used in Service Contracts and Transportation. However, not everyone wanted or needed the ability to use continuous price breaks.
Now, R12 has been enhanced to allow the ability to disable continuous price lists. This new functionality is made available and controlled by the profile "QP:Continuous Price Breaks". Additional information regarding the profile setting; as well as, what patches are needed for this functionality can be found in:
Doc ID 1488000.1 How Can One Disable Continuous Price Breaks In R12 of Oracle Applications?