Originally Posted by Flamer

Obligated is not necessarily true. From WSC.

A pilot's obligation to accept a trip on X days or regular line off days is not absolute, whether the trip is the result of a white slip (same day or next day), yellow slip, green slip, or inverse assignment. A variety of circumstances might make accepting such a trip impossible. For example:

• Not being physically located so as to be able to report.
• Having consumed alcohol.
• Lack of available child care.
• Lack of available transportation.
• Not being adequately rested.

Know your contract. Not all of the schedulers do.