The expression of a lexA::p65 driver under the control of an Actin promoter is prevented by an intervening stop cassette (which also contains GAL80 before the stop) flanked by loxP sites. (Thus this is a "Cre-dependent, LexA driver".).
An Actin promoter regulates expression of GAL80 that is included within a stop cassette flanked by loxP sites - GAL80 is before the stop.