Itc disllowed if the truck carries overload goods?

Vat officer is saying that we would disallow the input tax credit for the invoices in which trucks are overloaded i.e.,trucks carrying goods beyond there permissble limit ,such invoices input tax credit will be disallowed.

We would like to know how can this be possible? is it correct? if not how can we convince the officer as the same is not willing understand anything and says we would disllaow the credit.