Jeremy, what a law is meant to do (known as the 'mischief')and what it actually does are sometimes different things. While the law may be intended to stop sales of trash pearls, if it specifies the nacre depth over bead in all pearls then that is what is legal/not legal.
Likewise, the pearls have been exported...does the law provide only for pearls for sale or is it any pearls?
It sounds a bit like the UK marijuana law, where enforcement turned a blind eye to 'personal use' amounts and only prosecuted 'possession with intent to supply' but possessing even a smidge remained illegal, nevertheless.
I did not say that pearl farmers were in any way smuggling pearls. But poor quality pearls seems to be a real concern for forum members since the change in the law was announced.