A member who has contributed his industry exclusively, wishing to withdraw from the company, shall notify the company of his decision in the manner provided for in the first paragraph of article R. 4113-50. His withdrawal takes effect on the date he indicates or, failing that, on the date of such notification. However, the Articles of Association may provide that the withdrawal shall not take effect until the expiry of a period, which may not exceed six months from the date of notification by the member.