Trust named from a private-letter ruling by the IRS that involved a trust established by a Jewish congregation on behalf of its rabbi. The operation of the trust involves the employer's making contributions to the trust that are irrevocable. An independent trustee has control of the trust and must pay benefits from it if a stipulated event occurs, such as the death, disability, or retirement of the employee. If the employer becomes bankrupt or insolvent, the funds held in the trust are subject to the claims of the employer's creditors. The employer cannot take income tax deductions for its contributions to the trust until the funds in the trust are actually distributed to the employee.