5. After the publication of a notification under sub-section (1) of section 3, no owner of a private forest in the notified area shall enter into any new lease or extend the term of any existing lease in respect of such forest until the working plan in respect of such forest has been approved under sub-section (1) of section 4 except with the previous sanction of the Government and, after such working plan has been so approved, except in accordance with the terms and conditions of such plan and any lease entered into or any extension of the term of any lease granted in contravention of the provisions of this section shall, notwithstanding anything contained in any other law for the time being in force, be void and have no effect.