saltstack/salt — pull request #13124 by mgregson (2014-05-29 22:15:15+00:00)
Title: Allow association of exiting EIP

This will allow the user to specify an EIP allocation identifier in a map file, and have that EIP be associated with the created ENI when creating a new instance. Sadly it will not work on an EIP that is currently allocated, but I'll try to make another request for that in the future (once I have a better understanding of appropriate default behaviour).