( 4 ) Whereas the underuse of reference quantities by producers can prevent the sector of milk production from developing properly; whereas in order to avoid such practices Member States should have the possibility to decide in accordance with the general principles of Community law that , in cases of substantial underuse over a significant period of time , the unused reference quantities will revert to the national reserve with a view to their reallocation to other producers.. This sentence is hard to understand. A simpler version with equivalent meaning is the following:
( 4 ) Incomplete use of the reference quantities by producers may hamper the proper development of the milk production sector . In order to prevent such practices , Member States should be able , in accordance with general principles of Community law , to decide that , in the event of significant under-utilization for a significant period , the unused reference quantities should be returned to the national reserve so that they can be allocated to other producers .