Artikel 20

1. This Agreement shall enter into force on the first day of the second month following the date of receipt by the Depositary through diplomatic channels of the notifications of two Parties, one of which is the Republic of Kazakhstan, to the effect that the internal formalities required for entry into force have been observed.
2. With regard to any other Parties, this Agreement shall enter into force on the first day of the second month following the date of receipt by the Depositary through diplomatic channels of the notification to the effect that the internal formalities required for entry into force have been observed.
3. The Depositary shall inform each of the Parties through diplomatic channels of the notifications mentioned in paragraph 1 and 2 and of the dates of the entry into force of this Agreement vis-à-vis the Parties.
4. The provisions of the Article 3, paragraph 1 subparagraph 3) and 4) of the present Agreement shall apply upon expiry of 3 (three) years from the date set in the paragraph 1 of this Article. During that 3-years period, the provisions of the article 3, paragraph 1 subparagraph 3) and 4) shall apply exclusively to stateless persons and to nationals of those third States with whom the Parties have valid bilateral agreements or arrangements on readmission.