N.J. Stat. § 46:38-24.1
A custodian who executes an instrument of designation of his successor containing the custodian's resignation shall promptly do all things within his power to put each item of the custodial property in the possession and control of the successor custodian named in the instrument. The legal representative of a custodian who dies or becomes legally incapacitated shall promptly do all things within his power to put each item of the custodial property in the possession and control of the successor custodian named in an instrument of designation executed by the custodian or, if none, by the minor if he has no guardian and has attained the age of 14 years, or in the possession and control of the guardian of the minor if he has a guardian. If the custodian has executed more than one instrument of designation, his legal representative shall treat the instrument dated on an earlier date as having been revoked by the instrument dated on a later date.
N.J.S. § 46:38-24.1