Financial instrument established irrevocably for a minimum of 10 years, after which the principal reverts to the grantor upon termination of the trust. A key feature is that earnings from the principal traditionally have been taxed at the beneficiary's tax rate instead of the presumably higher tax rate of the grantor. An example is the CLIFFORD TRUST commonly used to save for a child's college expenses. Another example is the funded irrevocable LIFE INSURANCE TRUST. Under a typical arrangement, a grandparent might establish such a trust to fund premiums for permanent insurance on the life of a son or daughter, with the grandchildren as beneficiaries. At termination of the trust, the grandchildren would have a fully paid policy on their parent's life, and the trust assets would revert to the grandparent. Congress curtailed the tax advantages of short-term reversionary trusts in the Tax Reform Act of 1969 and again in the TAX REFORM ACT OF 1986.