Final answer:
A remainder estate becomes effective after a life estate ends when the life tenant passes away, allowing the remainderman to gain full ownership rights.
Step-by-step explanation:
A remainder estate becomes an effective ownership interest at the end of a life estate. A life estate is a type of property ownership where one person, the life tenant, has the right to use the property for their lifetime. After the death of the life tenant, the property passes to the remainderman, who then has full ownership rights. This transition occurs without the need for probate court when the property is held in a trust, as trusts are designed to facilitate the transfer of assets to heirs in a private manner and often become irrevocable upon the death of the settlor.