(i) A contract does not satisfy
paragraph (a) of this section unless it is maintained pursuant to a plan. For this purpose, a plan is a written defined contribution plan, which, in both form and operation, satisfies the requirements of
§ 1.403(b)-1,
§ 1.403(b)-2, this section, and
§§ 1.403(b)-4 through 1.403(b)-11. For purposes of
§ 1.403(b)-1,
§ 1.403(b)-2, this section, and
§§ 1.403(b)-4 through 1.403(b)-11, the plan must contain all the material terms and conditions for eligibility, benefits, applicable limitations, the contracts available under the plan, and the time and form under which benefit distributions would be made. For purposes of
§ 1.403(b)-1,
§ 1.403(b)-2, this section, and
§§ 1.403(b)-4 through 1.403(b)-11, a plan may contain certain optional features that are consistent with but not required under
section 403(b), such as hardship withdrawal distributions, loans, plan-to-plan or annuity contract-to-annuity contract transfers, and acceptance of rollovers to the plan. However, if a plan contains any optional provisions, the optional provisions must meet, in both form and operation, the relevant requirements under
section 403(b), this section, and
§§ 1.403(b)-4 through 1.403(b)-11.