(a) Provision of Notice.—
(b) Timing of Notice.—The Secretary shall provide notice under paragraph (1) of subsection (a) by the earlier of the following dates:
The date that the Secretary determines would afford individuals described in paragraph (2) of such subsection adequate time to understand the change covered by the notification.
The date that is 90 days before the date on which the change covered by the notification becomes effective.
The effective date of a significant change that is required by law.
(c) Significant Change Defined.—In this section, the term “significant change” means a systemwide change—