An ownership arrangement in which property management rights are given to a custodian for the benefit of a child beneficiary under the Uniform Gifts to Minors Act or the Uniform Transfers to Minors Act; a custodian's duties resemble those of a trustee, although the custodian does not take legal title to the trust property and custodianship ends when the minor reaches the age of majority as specified by state law. May also apply to property management rights of individuals who are determined to be incompetent to handle their own affairs.