What is the number of the permit form that Department of Homeland Security gives to students?
It is called Work permit I-766 from DHS, if he has one you must present it when applying.
Will the " If your child does not have permission to work " section address the question of what to do while waiting for a Work permit I-766 from DHS?
Yes all of that is covered in the " If your child does not have permission to work " section.