The program calls for conventional deadlifts, which are generally narrow to hip width depending on the individual.
Just keep in mind that the narrower your stance and grip, the less distance the bar has to move (unless you're pulling sumo which is a different lift).
You can youtube deadlifting mechanics and pull up some Dave Tate and Mark Rippetoe vids, or better yet get the book Basic Barbell Training by Mark Rippetoe so you have a good form reference.