<Ul> <Li> Vulnerable Group Access (including children), as operated by the Disclosure and Barring Service (DBS), replacing former Criminal Records Bureau (CRB) and Independent Safeguarding Authority (ISA) checks </Li> <Li> Law Enforcement, with a hierarchy of Police Personnel Vetting (PPV) and Non-Police Personnel Vetting (NPPV) levels, which are broadly aligned with National Security Clearance levels, but differ in focusing predominantly on susceptibility to criminality </Li> </Ul> <Li> Vulnerable Group Access (including children), as operated by the Disclosure and Barring Service (DBS), replacing former Criminal Records Bureau (CRB) and Independent Safeguarding Authority (ISA) checks </Li> <Li> Law Enforcement, with a hierarchy of Police Personnel Vetting (PPV) and Non-Police Personnel Vetting (NPPV) levels, which are broadly aligned with National Security Clearance levels, but differ in focusing predominantly on susceptibility to criminality </Li> <Table> <Tr> <Td> </Td> <Td> This article includes a list of references, but its sources remain unclear because it has insufficient inline citations . Please help to improve this article by introducing more precise citations . (August 2009) (Learn how and when to remove this template message) </Td> </Tr> </Table>

What's the difference between secret and top secret clearance