(Rate schedule) may be filed by transporter.Logical formLearned from2 sentences. Transporter may place changes.Logical formLearned from2 sentences. Transporter may respond to requests.Logical formLearned from2 sentences. Transporter may post an offer.Logical formLearned from2 sentences. Transporter may enter into a (discount agreement).Logical formLearned from2 sentences. A (date payment) may be received by transporter.Logical formLearned from2 sentences. Ownership of gas may be substantiated by transporter.Logical formLearned from2 sentences. Gas may become a property of transporter.Logical formLearned from2 sentences. Transporter may notify shippers of (emergency adjustments) of receipts.Logical formLearned from2 sentences. Transporter may carry_forward a difference to a (calendar year).Logical formLearned from2 sentences. A level may be specified by transporter.Logical formLearned from2 sentences. Transporter may evaluate some requests.Logical formLearned from2 sentences. (Transportation services) may be rendered by transporter.Logical formLearned from2 sentences. Transporter may calculate an amount.Logical formLearned from2 sentences. A service may be released by transporter.Logical formLearned from2 sentences.