(a) General. The holder of a certificate with an expiration date may not, after that date, exercise the privileges of that certificate.

(b) Student pilot certificate. A student pilot certificate expires 24 calendar months from the month in which it is issued.

(c) Other pilot certificates. A pilot certificate (other than a student pilot certificate) issued under this part is issued without a specific expiration date. The holder of a pilot certificate issued on the basis of a foreign pilot license may exercise the privileges of that certificate only while that person's foreign pilot license is effective.

(d) Flight instructor certificate. A flight instructor certificate:

(1) Is effective only while the holder has a current pilot certificate; and

(2) Except as specified in §61.197(b) of this part, expires 24 calendar months from the month in which it was issued or renewed.

(e) Ground instructor certificate. A ground instructor certificate issued under this part is issued without a specific expiration date.

(f) Surrender, suspension, or revocation. Any certificate issued under this part ceases to be effective if it is surrendered, suspended, or revoked.