The administrator shall furnish to each participant, and each beneficiary receiving benefits under the plan, every fifth year after the plan becomes subject to this part an updated summary plan description described in section
1022 of this title which integrates all plan amendments made within such five-year period, except that in a case where no amendments have been made to a plan during such five-year period this sentence shall not apply. Notwithstanding the foregoing, the administrator shall furnish to each participant, and to each beneficiary receiving benefits under the plan, the summary plan description described in section
1022 of this title every tenth year after the plan becomes subject to this part. If there is a modification or change described in section
1022
(a) of this title (other than a material reduction in covered services or benefits provided in the case of a group health plan (as defined in section
1191b
(a)(1) of this title)), a summary description of such modification or change shall be furnished not later than 210 days after the end of the plan year in which the change is adopted to each participant, and to each beneficiary who is receiving benefits under the plan. If there is a modification or change described in section
1022
(a) of this title that is a material reduction in covered services or benefits provided under a group health plan (as defined in section
1191b
(a)(1) of this title), a summary description of such modification or change shall be furnished to participants and beneficiaries not later than 60 days after the date of the adoption of the modification or change. In the alternative, the plan sponsors may provide such description at regular intervals of not more than 90 days. The Secretary shall issue regulations within 180 days after August 21, 1996, providing alternative mechanisms to delivery by mail through which group health plans (as so defined) may notify participants and beneficiaries of material reductions in covered services or benefits.