The best way to handle overseas-data consent? Never send it overseas.
Most teams are preparing to ask clients for consent to send data offshore. The sharper question is why it is leaving at all.
IPP 9 of WA’s new Act restricts disclosing personal information outside Australia. The usual response is to build a consent mechanism: a clause, a checkbox, a form that asks the individual to agree to their data leaving the country. It is lawful, but it is fragile. Consent can be refused, withdrawn, or later challenged as not genuinely informed, and every one of those outcomes lands back on you.
There is a cleaner path. If personal information never leaves Australia, the overseas-disclosure obligation is not required, and the consent question never arises. The exposure is not reduced; it is designed out. This is not a loophole. It is the outcome the principle is built to encourage.