{"content_versions":[{"date":"2016-11-22","amendment_date":"2016-11-22","issue_date":"2016-12-31","identifier":"173.255","name":"§ 173.255   Methylene chloride.","part":"173","substantive":true,"removed":false,"subpart":"C","title":"21","type":"section"}],"meta":{"title":"21","part":"173","section":"173.255","result_count":"1","latest_amendment_date":"2016-11-22","latest_issue_date":"2016-12-31"}}