If two or more
(2) Determination of years of participation for multiple plans. If two or more defined benefit plans are aggregated under section 415(f) and this section for a particular limitation year, in applying the reduction for participation of less than ten years (as described in section 415(b)(5)(A)) to the dollar limitation under section 415(b)(1)(A), time periods that are counted as years of participation under any of the plans are counted in computing the limitation of the aggregated plans under this section. (3) Determination of years of service for multiple plans. If two or more defined benefit plans are aggregated under section 415(f) and this section for a particular limitation year, in applying the reduction for service of less than ten years (as described in section 415(b)(5)(B)) to the compensation limitation under section 415(b)(1)(B), time periods that are counted as years of service under any of the plans are counted in computing the limitation of the aggregated plans under this section.