and 40 shall enter into force for all States Parties on the thirtieth day after the number of instruments of acceptance deposited reaches two thirds of the number of States Parties at the date of adoption of the amendment. Article 48 Denunciation A State Party may denounce the present Convention by written notification to the Secretary-General of the United Nations. The denunciation shall become effective one year after the date of receipt of the notification by the Secretary-General. Article 49 Accessible format The text of the present Convention shall be made available in accessible formats. Article 50 Authentic texts The Arabic, Chinese, English, French, Russian and Spanish texts of the present Convention shall be equally authentic. 20