It should also be possible under sufficiently clear clauses to provide for adaptations of the contract which are rendered necessary by technical difficulties which have appeared during operation or maintenance.
Samuti peaks piisavalt selgesõnaliste klauslite korral olema võimalik ette näha hankelepingusse tehtavad kohandused, mille vajaduse on tinginud käitamise või hooldamise ajal ilmnenud tehnilised raskused.