What is a PAS24 door? PAS 24 is a British standard for enhanced security performance requirements for door assemblies intended to resist intruder attempts. PAS stands for Publicly Available Specification, which means it is a standard that is available to the public to use and follow. PAS 24:2016 was developed by the British Standards Institution (BSI) in collaboration with the police and the building industry. It specifies the minimum requirements for the design, construction, and installation o