Several other organisations were involved in making the agreement possible.  The Swedish Media Council arranged the joint meeting together with the Swedish National Post and Telecom Agency and the National Criminal Investigation Department.

The technical requirements to block websites by means of a filter already exist. The National Criminal Investigation Department decides which websites should be blocked. It gives the addresses to the ISPs who are responsible for blocking access to them.

When someone tries to access a blocked site a message explains why the web page is blocked. The message will also contain contact information for The National Criminal Investigation Department.

No records will be kept of the attempts to reach the blocked sites however, since this would be in violation of Swedish law.

Several of the ISPs have announced that the filter is already in effect.  Distribution of child pornography through other means such as file sharing, e-mail and such are not affected by the filter.