Here are some links to other organisations that deal with things like film labelling, broadcasting regulation, internet safety and New Zealand laws.
The advertising industry practises self-regulation under the Advertising Standards Authority (ASA), an industry-run organisation. They do not work within a legal framework, but have a set of agreed codes which can be read on the ASA website.
NetSafe is an independent non-profit organisation that promotes confident, safe, and responsible use of online technologies. They promote cybersafety and champion digital citizenship by educating and supporting individuals, organisations and industry on a range of issues.