Protecting, authorising, and controlling access to vital areas using several security layers prevents unauthorised persons to gain access to high-risk materials. Therefore, the pillar ‘Physical security’ focuses on access authorisation and control and other physical security measures. It provides also insight into several aspects of layered or fragmented security, types of physical measures and security systems, authorisation and control of access and employee awareness and alertness.
This biosecurity pillar of good practice provides insight into:
- Layered or fragmented security.
- Types of physical measures.
- Types of security systems.
- Authorisation and control of access.
- Employee awareness and alertness.
 In the Netherlands, human and animal high-risk pathogens are categorised as Biosafety level 3 or 4, and plant pathogens listed as Quarantine organisms. By high-risk materials we refer to materials in which high-risk pathogens are present, for example: plant, animal or human tissues, or samples of environmental matrices (air, water and soil). Scientific articles, protocols, data, data carriers, or other materials containing information on high-risk pathogens, with a possible dual-use application, are referred to as sensitive material.