Occurrence tab screen was enabled in audit criterion and in all requirements with lower level requirements, enabling the system to list all the occurrences of the levels below the selected level. For the lowest level requirements, the rule to enable the screen should not be edited. Add fields related to the requirements, for grouping cases. For audit, combos will not be necessary, as occurrences are associated only with the last levels. Generic class will not control, neither add combos. If necessary, that should be done by the user who needs that, as it is done with those that already exist. Screen general rule will not be edited, so it will be in view mode.