A change of critical information to the original request. These revisions affect the location/extent of work field, member notification, or other pertinent dig information as well as pertinent contact information such as phone number, fax number or email address. An excavator may also subsequently notify Ontario One Call that they now have an emergency locate request and a change must subsequently be made from a standard or priority to an emergency request category. A new request number is issued and the old request number is referenced. “UPDATE” is visible in the top right field of the ticket. A cancellation is issued for the original request. This will be treated as a new request for billing purposes.