Some info about incidents. I dont work directly with run cards and how they are picked, but since today's natural gas leak was upgraded to a task force or box, they cant upgrade natural gas leak call types. In the past they have changed the call type to residential fire and then upgraded. I think they now change them to a HAZMAT Incident so they can get the upgraded assignment.
(Note, only a few call types have box or task force assignments. Example, Residential/Commercial Fires, Brush/Grass Fires, Aircraft incidents, Train Accidents, HAZMAT incidents and MVA's have medical alarms. I believe there is a multiple patient or something call type also.)