The Airport employee ID card is a credit card sized ID card featuring a finger-sized circular cut-out. It has a gunmetal-grey color with golden highlights. The words "Level Clearance" and "Access" are legible on the anterior side of the card, among illegible numbers. A magnetic stripe is present on the posterior side.
The card is obtainable from Initiate Clarke in the Boston Airport during the mission Duty or Dishonor, either from looting his corpse, pickpocketing it, or having it given to the Sole Survivor upon speaking with him and ending the conversation peacefully.