(1) A plan shall take effect:
(a) On the date of its approval by the secretary; or (b) On a date specified within the plan if that date occurs after its approval by the secretary.
(2) Each plan:
(a) Shall expire at the end of twelve (12) full calendar months after its effective date; or (b) If a plan is revoked by the secretary, shall terminate on the date specified in the secretary's written order of revocation.
(3) A shared work employer may terminate an approved plan by providing the secretary and each employee in every affected group covered by the plan with a written notice. Such notice shall:
(a) Contain a message indicating that the plan is being terminated;
(b) Identify the date on which the termination will go into effect; and (c) Be delivered to the secretary and each employee in each affected group covered by the plan no less than thirty (30) days prior to the termination date.