Licensed medical professionals have a license clause that states they must assist in time of need. Failure to do so can result in loss of their license.
Can it be apply for a climber in mt washington snowstorm? So, calling 911 automatically create an obligation???
Yes it does create an obligation...why would we have it if it didn't 
the post is just to know the probematic. if we have a number where we call like the 911 for climber, it could be a safe and good way to protect people an avoid costly rescue. i saw a rescue one time and they did it in half an hours, i didn't have time to arrive at the belay than the guy came on the bottom, climb the cliff take the guy and bring him to the bottom safely. Ounce we know the problematic, we can find solution in the same way as we know our technique we can find a solution