Page 33 of the 2015 FIA WRC Sporting Regulations states "2015 FIA World Rally Championship Sporting Regulations"
33/98 Application from: 01/01/2015
Published on: 08/12/2014
39. INTERRUPTION OF A SPECIAL STAGE
When a special stage is interrupted or stopped for any reason, each crew affected will be allocated by the
clerk of the course a time which is judged the fairest. However, no crew which is solely or jointly
responsible for stopping a stage may benefit from this measure.

So it is possible the final results of a World Championship could be decided by arbitrary stage times decided by a Clerk of the Course.