cheap Neurontin online A contract between a natural gas producer and a pipeline company that requires the pipeline company to pay for a certain amount of natural gas, whether or not the buyer takes the entire quantity. Pricing techniques used to carry forward to future years the costs traditionally recovered by tolls during the first years of a pipeline`s life cycle, in order to offset tolls over time. Can we also refer to the relocation of tolls in a shorter period of time, for example for a significant increase in tolls. (See inequalities between generations) The risk that the physical availability of supply could affect the revenue capacity of an oil pipeline. .