Originally Posted by BeechJunk

The key is "what is the company policy". If the company policy says phone call assignment of rest is adequate, then it is adequate. If there is no detailed written policy on how the company will comply with rest, then the Pilots should request the company provide detailed written guidance that describes how they will comply with "prospective rest assignments".

Here is a Link to all FAA Interpretation Letters if you are need them:

Regulations Division ? Legal Interpretations & Chief Counsel's Opinions