This read-create INTEGER is the first of up to eight tuple-pointer slots in an ACE, pointing to the Tuple table entry that supplies the first match condition, such as a source address or port value, for this access control entry. An admin builds a multi-condition classification rule by populating this and up to seven more tuple-pointer slots, each referencing a different previously defined Tuple, so the ACE as a whole matches on several fields simultaneously. For example, an admin building a rule to match traffic from a specific source subnet would set this first tuple slot to point at the Tuple entry holding that subnet's address and mask.