(iii) After August 1, 1969, pursuant to a written plan in which the employee participated on April 22, 1969 and under which the obligation of the employer is essentially the same as under a binding written contract, are not subject to paragraph (a) of
§ 1.403(a)-1 or paragraph (a) of
§ 1.403-1, the amount of such contribution shall, to the extent it is not excludible under paragraph (b) of
§ 1.403(b)-1, be included in the income of the employee for the taxable year during which such contribution is made if, at at the time the contribution is made, the employee's rights under the annuity contract are nonforfeitable, except for failure to pay future premiums. If the annuity contract was purchased by an employer which is not exempt from tax under
section 501(a) or
section 521(a), and if the employee's rights under the annuity contract in such a case were forfeitable at the time the employer's contribution was made for the annuity contract, even though they become nonforfeitable later the amount of such contribution is not required to be included in the income of the employee at the time his rights under the contract become nonforfeitable. On the other hand, if the annuity contract is purchased by an employer which is exempt from tax under
section 501(a) or
section 521(a), all or part of the value of the contract may be includible in the employee's gross income at the time his rights under the contract become nonforfeitable (see
section 403(d) prior to the repeal thereof by the Tax Reform Act of 1969 and the regulations thereunder). As to what constitutes nonforfeitable rights of an employee, see
§ 1.402(b)-1(d)(2). The amounts received by or made available to the employee under the annuity contract shall be included in the gross income of the employee for the taxable year in which received or made available, as provided in
section 72 (relating to annuities). For taxable years beginning before Janaury 1, 1964,
sections 72(e)(3) (relating to the treatment of certain lump sums), as in effect before such date, shall not apply to such amounts. For taxable years beginning after December 31, 1963, such amounts may be taken into account in computations under
sections 1301 through 1305 (relating to income averaging). For rules relating to the treatment of employer contributions as part of the consideration paid by the employee, see
section 72(f). See also
section 101(b)(2)(D) for rules relating to the treatment of the limited exclusion provided thereunder as part of the consideration paid by the -employee.