A regulation requires new applicants to provide a scan of their retinas in case of...

 Non-repudiation is a security concept that refers to the ability to prove the origin and authenticity of an action or communication, such as an email or a document. Non-repudiation prevents someone from denying their involvement or responsibility for something they have done or sent. Non-repudiation can be achieved by using methods such as digital signatures, encryption, timestamps, or biometric data. For example, scanning the retinas of new applicants can provide non-repudiation in case of any future legal questions regarding who applied for the position89. References := CompTIA IT Fundamentals (ITF+) Study Guide, 2nd Edition, Chapter 6: Security3; What is Non-Repudiation? - Definition from Techopedia10