YES we reserve the right to change the volunteer time up to one week before the event. This is mainly due to the different logistical constraints, the possible additions of waves, etc.
Also we may need to shorten or lengthen the time of presence of volunteers. We will keep you informed as soon as we can. If you can not be flexible on your availability, volunteering on a Spartan probably will not be for you, (a little too directive in my opinion), thank you to report it by mail to firstname.lastname@example.org, at least one week before the event.