A long-form agreement for the fractionation of natural gas liquids between a midstream company as the fractionator and an upstream producer as the customer. This Standard Document includes key commercial and legal provisions covering performance obligations, fees and escalation, representations and warranties, title and custody, liabilities and indemnities, force majeure, change in law, default, and termination. It also addresses operational matters, including, nominations, quality specifications, measurement and testing, operational imbalances, and allocations. This Standard Document has integrated notes with important explanations and drafting and negotiating tips for fractionators and customers.