(a) Treatment of a custodial account or an annuity contract as a qualified trust. Beginning on January 1, 1974, a custodial account or an annuity contract may be used, in lieu of a trust, under any qualified pension, profitsharing, or stock bonus plan if the requirements of
paragraph (b) of this section are met. A custodial account or an annuity contract may be used under such a plan, whether the plan covers common-law employees, self-employed individuals who are treated as employees by reason of
section 401(c), or both. The use of a custodial account or annuity contract as part of a plan does not preclude the use of a trust or another custodial account or another annuity contract as part of the same plan. A plan under which a custodial account or an annuity contract is used may be considered in connection with other plans of the employer in determining whether the requirements of
section 401 are satisfied.