There will be an obligation on the Authorities to commit all its residual waste in volume to be agreed for the purposes of meeting the tonnage requirements under the project agreement except for a de minimis level of residual waste that by it's nature in terms of composition or structure must go to landfill. The Authorities will undertake to each other not to commission and or undertake any procurement and/or project that seeks or would procure the delivery of all or any part of the PFI Project outside the terms of the Project Agreement subject to partial termination at Paragraph 9 below.