Settlor - presumed revocable unless made irrevocable Trustee - normally cannot make changes unless given power by trust instrument or state law -- if there is less than $20,000 in trust trustee can terminate without court permission Beneficiaries - may consent to modification; if irrevocable need unanimous consent and court approval for modification or termination -- court usually will not terminate if any material provisions remain; but not adopted strictly in CA because there can be problems that outweigh the material purposes -- court cannot terminate if there is a spendthrift provision