A charitable remainder unitrust (known as a "CRUT") is an irrevocable trust created under the authority of Internal Revenue Code ("Code"). This special, irrevocable trust has two primary characteristics: (1) Once established, the CRUT distributes a fixed percentage of the value of its assets (on an annual or more frequent basis) to a non-charitable beneficiary (which is considered the settlor of the trust); and (2) At the expiration of a specified time (usually the death of the settlor), the remaining balance of the CRUTs assets are distributed to charity. The trustee determines the fair market value of the CRUT's assets at the time of contribution, and thereafter on the applicable valuation date. The fixed annuity percentage must be at least 5% and no more than 50% of the fair market value of the assets in the corpus. The remainder (the amount expected to go to charity) must be at least 10% of the fair market value of the assets contributed to the CRUT. Code Section 664(d)(1) sets the federal income tax requirements for a charitable remainder unitrust.