Russe ⇄ Anglais

обязанность поставщика услуг по заправке ВС иметь резервный запас топлива contraintes
aviat.	Compulsory Stock Obligation (In the UK, a Compulsory Stock Obligation (CSO) is a minimum stock of fuel reserves that must be held by a supplier against shortages or interruptions in supply. 4uzhoj)