{"content_versions":[{"date":"2016-11-22","amendment_date":"2016-11-22","issue_date":"2016-12-31","identifier":"177.1640","name":"§ 177.1640   Polystyrene and rubber-modified polystyrene.","part":"177","substantive":true,"removed":false,"subpart":"B","title":"21","type":"section"},{"date":"2016-11-22","amendment_date":"2016-11-22","issue_date":"2023-03-30","identifier":"177.1640","name":"§ 177.1640   Polystyrene and rubber-modified polystyrene.","part":"177","substantive":false,"removed":false,"subpart":"B","title":"21","type":"section"}],"meta":{"title":"21","part":"177","section":"177.1640","result_count":"2","latest_amendment_date":"2016-11-22","latest_issue_date":"2023-03-30"}}