This read-create integer is tuple pointer #1 for this ACE, referencing the first matching-criteria element, such as a source address or port entry, used to build the rule. Because an ACE's actual match conditions are built from a set of numbered tuple pointers rather than inline fields, this pointer is one building block of what the rule actually matches. For example, tuple pointer 1 might reference a source-IP entry in a separate table, so this ACE checks against a specific source address as its first criterion.