When describing the side effects of removing a host from a cluster, the second item if the bulleted list in the slide notes states:
Virtual machines with disks on local storage must be powered off, suspended, or migrated to another host and datastore by using EVC.Correct:
EVC - Enhanced vMotion Compatibility - is something completely different from what you need here to migrate virtual machines either to a different host or to another datastore.
This is a typo, likely caused by a "search & replace" task with the text editor. The author, here, very likely wanted to say Enhanced vMotion (hence the typo while shortening the term), which has been now renamed into Cross-Host vMotion in vSphere 5.5.