Where a Contractor is not able to accept Contract Waste at the intended Delivery Point and the relevant collection vehicles are diverted to a Contingency Delivery Point, the Authority should be entitled to make a deduction from the Unitary Charge. The deduction should reflect both the additional operational and transport costs incurred by the party that is delivering the Contract Waste (i.e. the Waste Collection Authority) and any fixed costs incurred by the Authority, which are not proportionate to the additional mileage.
In two tier Authorities one purpose of the Mileage Deduction is to compensate the Waste Disposal Authority for "tipping away" payments it may be obliged to make to the District Councils responsible for collection and the deduction rate should be quantified accordingly.