CSS Containment Module Level 1 publication history Date Status 25 June 2024 Recommendation 25 October 2022 Recommendation 22 December 2020 Recommendation 21 November 2019 Recommendation 15 October 2019 Proposed Recommendation 30 April 2019 Candidate Recommendation Snapshot 8 November 2018 Candidate Recommendation Snapshot 24 May 2018 Candidate Recommendation Snapshot 8 August 2017 Candidate Recommendation Snapshot 19 April 2017 Working Draft 21 February 2017 First Public Working Draft