Tina: Ive never seen a reg interpretation or definitive answer to your question, but heres how we handle it:
1) If the living trust is a grantor trust under IRS Regs (defn: a trust in which the creators of the trust are also the initial trustees and the initial beneficiaries), then we treat it as if it is consumer credit and provide all Reg Z disclosures.
2) if the living trust isnt a grantor trust under the IRS Regs (defn: typically the creators of the trust either arent the initial trustees or the beneficiary [such as a trust for a disabled child]), then we dont treat as Reg Z consumer credit.
Our thinking is that a grantor trust is really an estate planning device in which the owners of property transfer their property to a trust so it can operate more like a will than a "true" trust.
When you have a "true" trust and the creators have either given up immediate control of trust assets (because they arent the trustees) or ownership of the assets (because they arent a beneficiary), then we dont consider it to be consumer credit subject to Reg Z.
I would really be interested in how others are handling this situation. It isnt unusual for us to see several of these deals per month and the numbers seem to be increasing.