N.Y.C. Admin. Code § 28-408.5: § 28-408.5 Surrender of license and seal.

Upon the death or the retirement of a licensed master plumber, or upon the surrender, revocation or suspension of his or her license, his or her license and seal shall immediately be surrendered to the commissioner. Nothing contained herein shall be construed to prevent the legal representative of a deceased licensee, with the consent of the commissioner, from retaining such seal for the purpose of completing all unfinished work of the deceased licensee for which plans have been approved and a permit issued, provided such work is performed by or under the direct and continuing supervision of a licensed master plumber and is completed within one (1) year from the date of the death of the original licensee. Retired licensees and the legal representatives of deceased licensees shall schedule for inspection, withdraw or have another licensee re-file any open application filed under such license in accordance with department procedures.