Every site is further regulated and inspected by the local Police Authority in this case the Beijing Public Security Bureau and is a mandatory requirement. The ICP is national and the PSB License is regional: it indicates to the local police authorities and to users that the site content has been approved (locally) the organisation approving the site is: called the "public security bureau" which is our equivalent of the police responsible for local security.

So the difference is that ICP is a STATE registration with the Ministry of Industry and Information Technology (MIIT) and the the second (PSB) license is FEDERAL and reports to the state and the communist party

This second item comes under the responsibility of "public safety and information"