Section 69(1) FPG links its effect to fulfilment of the departure obligation.
Once the duty under section 70 FPG has been fulfilled, section 69(1) states that the expulsion becomes moot. Compare the complete decision with the date of enforceability, any deferral of enforcement and the actual end of the stay.
Check whether the decision contains another measure. The rule for an expulsion does not resolve that separate question.