This is how it reads in the US West agreement.:
C. SUBCONTRACTING
"Subcontracting Revenue Flying" as used in this Agreement shall refer to and be limited to transactions in which the Company pays a fixed sum of money to another air carrier or third party contractor pursuant to an agreement whereby:
the other carrier transports the Company’s passengers using the other carrier’s or third party contractor’s aircraft and/or Flight Attendants, and
the Company receives all of the revenue collected from such passengers.
The Company may only engage in Subcontract Revenue Flying for periods not in excess of one hundred and eighty (180) days per occurrence during the term of this Agreement when:
such Subcontracted Revenue Flying is necessary to accomplish the needs of the Company, and
the Company determines that it does not have sufficient or appropriate aircraft, or sufficient or appropriately trained Flight Attendants available to perform the Subcontracted Revenue Flying.
The Company will not furlough any Flight Attendant as a direct result of engagement in Subcontracted Revenue Flying; however, it is understood and agreed that nothing in Paragraph C.2, above, will prevent the Company from furloughing Flight Attendants for economic reasons independent of or unrelated to its engagement in Subcontracting Revenue Flying.
4. Subcontracted Revenue Flying shall not include any flying performed by another carrier whereby the other carrier transports passengers pursuant to a code-share agreement, a marketing agreement, an interline agreement, a pro-rate agreement or a block-space agreement, and there shall be no contractual restrictions on such flying or on any other flying performed pursuant to any other marketing or alliance agreement or arrangement.
5. Notwithstanding Paragraph C.2, above, in the event the Company engages in Subcontracted Revenue Flying solely due to circumstances over which the Company does not have control, it may engage in the Subcontracted Revenue Flying for a time not to exceed the duration of the circumstance beyond the Company’s control or twelve (12) months, whichever is less. Circumstances beyond the Company’s control shall include: an act of nature; a labor dispute; grounding of a substantial number of the Company’s aircraft by a government agency or a court; loss or destruction of the Company’s aircraft; involuntary reduction in flying operations due to either a decrease in available fuel supply or other critical materials for the Company’s operation; revocation of the Company’s operating certificate(s); war emergency or owner’s or manufacturer’s delay in the delivery of aircraft scheduled for delivery.
