Final answer:
The absence of a regularly conducted activity defined under section 803(7) is the absence of the activity altogether.
Step-by-step explanation:
The absence of a regularly conducted activity defined under section 803(7) refers to an activity that is not conducted at all. It means that the activity does not take place in any form or frequency. This can be different from an activity that is conducted irregularly or occasionally, as those activities still happen, albeit not on a regular basis.