| http://www.w3.org/ns/prov#value | - Record here prepayments of obligations applicable to periods extending beyond one year such as payments on leased property and equipment and other payments and advances for rents, rights, or other privileges. 1830 Unamortized Developmental and Preoperating Costs. (a) Record here costs accumulated and deferred by the air carrier pertaining to the development of new routes or extension of existing r
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