The administration of a trust is governed by the trust instrument itself. For properties held in trusts, Revenue and Taxation Code section 61(h) states that a change in ownership occurs when any interests in real property vest in persons other than the trustor or the trustor’s spouse or registered domestic partner when a revocable trust becomes irrevocable. This typically occurs upon the death of the trustor. The date of death is considered to be the date of change in ownership. Proposition 19 is clear that Proposition 58 applies to transfers that occur on or before February 15, 2021, and Proposition 19 applies to transfers that occur on or after February 16, 2021.