A rider to the inter-company savings plan may be concluded in accordance with the terms and conditions set out in this chapter.
However, the rules of a plan set up between several individual employers and open to membership by other companies may validly be amended to incorporate legislative or regulatory provisions subsequent to the setting up of the plan or new provisions relating to 2°, 3° and 5° of the rules of this plan in accordance with article L. 3333-3, if the companies involved in the plan are informed of this amendment.
The amendment provided for in the second paragraph of this article applies on condition that the majority of the undertakings participating in the plan do not object within one month of the date on which the information is sent and, for each undertaking, from the first financial year following the date on which the information is sent. Otherwise, the plan is closed to any new payments.