A computer-implemented method and system for supporting a person at a site, venue, or location where the person may have a requirement. The method and system include storing a requirement code in a handheld device, and storing the requirement code and at least one characteristic relating to the requirement code in a requirement certification database. The requirement code is transmitted from the handheld device to a sensor at the site, and action data is received by a facility of the site from the requirement certification database. The action data is indicative of an action to be performed by the facility, dependent on the requirement code and the at least one characteristic, such that the facility adapts its function to a requirement of the person having the requirement.