Interaction between dynamic business rules and rule groups

A rule may only belong to one group but a group does not necessitate rules. In addition, you may change the order of rule groups themselves.

When creating or editing rule groups, keep in mind the following interactions between rules and rule groups:

Rules may be moved from one rule group to another. However a rule can appear in only one group.
A rule group may be empty (that is, it does not have to contain rules).
The order of rule groups with respect to other rule groups may be changed.