Controls how strict TaskJuggler checks booking intervals for conflicts with working periods and vacations. This attribute only affects the check for conflicts. No assignments will be made unless the overtime attribute is set accordingly.

• 0: Period may not contain any off-duty hours, vacation or other task assignments. (default)

• 1: Period may contain off-duty hours, but no vacation time or other task assignments.

• 2: Period may contain off-duty hours and vacation time, but no other task assignments.