Помогите разобраться, что такое FREE FLOW.

В Definitions дано такое определение:

« Free Flow » means that each Operating Partner will keep full control of its inventory by maintaining its right to open or close booking classes according to the Operating Partner's yield management policy. The Marketing Partner will have a full access to the Operating Partner's inventory according to a class mapping, matching respective reservation booking classes. The Marketing Partner will process sales based on availability updated by the Operating Partner. The exchange will be based on the Operating Partner flight number/class information

Суть понятна, но как по-русски этот free-flow сказать?

Заранее спасибо!