In general
Under rules prescribed by the Secretary, except as provided in paragraph (2), no amount shall be includible in gross income by reason of—
(A)#
a transfer of all or a portion of the accrued benefit of a participant or beneficiary, whether or not vested, from a church plan that is a plan described in section 401(a) or an annuity contract described in section 403(b) to an annuity contract described in section 403(b), if such plan and annuity contract are both maintained by the same church or convention or association of churches,
(B)#
a transfer of all or a portion of the accrued benefit of a participant or beneficiary, whether or not vested, from an annuity contract described in section 403(b) to a church plan that is a plan described in section 401(a), if such plan and annuity contract are both maintained by the same church or convention or association of churches, or
(C)#
a merger of a church plan that is a plan described in section 401(a), or an annuity contract described in section 403(b), with an annuity contract described in section 403(b), if such plan and annuity contract are both maintained by the same church or convention or association of churches.