The most recent explanation of the government's position on this issue is provided on the ministry website. This clearly states that only ISP-level filtering of (designated) "refused classification" (RC) material will be "mandatory" under their policy. However, ISP's will be "encouraged" to offer ISP-level filtering of 'adult content' as an "optional" (commercial) service to their customers. Such an optional extra service is aimed at parents trying to protect their children from 'undesirable' content that would otherwise be available, because it would not be RC (e.g., it might receive a classification of "R").