Australia is introducing (or may have already passed?) a similar Act with an AU $10K limit on "unapproved" cash transactions.
Over the limit you'll need approval.
Of course the usual loophole for the weathy applies, 3x $3,000 face value gold bullion coins [1] is under the cash transaction limit, although at a kilo each and ~$88K per in valuae, that's almost $300K in value technically under any travel or transaction declaration "$10K face value" limits . . .
[1] https://www.perthmint.com/shop/bullion/bullion-coins/austral...