Finally a descent human language in the waver:

"For wholly rescheduled travel departing after November 15, 2017, or for a change in departure or destination city, the change fee will be waived, but a difference in fare may apply. Rescheduled travel must be completed within one year from the date when the ticket was issued."

Thank you United. Please do this from now on at the onset of the disaster and not after Department of Transportation starts looking at price gouging allegations.