[GeorgeDewar]

In fact, such material is already illegal to possess or trade. The official classification just clarifies that after the fact.

The law that makes this material objectionable is the same one that makes child pornography illegal, and it should be obvious that it wouldn't work very well if each video involving sex with children had to be classified as objectionable before it became illegal.

The criteria are here:

https://www.dia.govt.nz/Censorship-Objectionable-and-Restric...