The following principles apply when several time limitations are in effect for one lesson:
Overlapping term with lessons groups and “From-to” constraints
Lesson groups and “From-to” constraints have an effect irrespective of whether terms are defined or not.

Lesson data can be saved on a term-specific basis, as described in chapter “Changing Data in a Term” . If there is a time limitation for a lesson in a term in which this is not defined the lesson will never take place.

Overlapping lesson groups and “From-to” constraints
The principle of lowest common denominator applies to overlapping lesson groups with “From-to” constraints. If there is no overlap the lesson will never take place.

If there are conflicting lesson group and “From-to” constraint entries, the “From-to” limitation of the lesson will apply.
