If the applicant is under 21 the card is marked “Under -21” and is valid until their 21st birthday. A parent or legal guardian must sign the application for anyone younger than 18 years of age. For all other applicants under the age of 65, the expiration date of the ID card will be the birthday of the applicant in the fourth year following the date of issuance of the card. ID cards issued to applicants age 65 or over shall be valid for the lifetime of the applicant.