Which one of the following is not an essential ingredient of Pass System ?

In the context of industrial security and access control (such as the protocols followed by the Central Industrial Security Force - CISF), a Pass System is a mechanism used to regulate and monitor the entry of personnel into protected premises. The essential ingredients for verifying a pass at an entry point include:

• Photograph: To ensure the identity of the bearer matches the authorized person.
• Signature Verification: To ensure the pass was issued by a legitimate and competent authority.
• Date of Validity: To confirm that the pass is current and has not expired.

The Address of the person is a demographic detail usually recorded in the records or application forms during the issuance process, but it is not considered an essential ingredient to be displayed on or verified from the pass itself for the purpose of granting immediate access. Therefore, option D is the correct answer.