{"database": "openregs", "table": "federal_register", "rows": [["2018-04577", "Revocation of Class E Airspace; Centerville, MD", "Rule", "This action removes Class E airspace extending upward from 700 feet above the surface at Centerville, MD. Because the Maryland State Police Trooper 6 Heliport has moved, controlled airspace is no longer required at this location. Another rulemaking will be forthcoming establishing controlled airspace at the heliport's new location.", "2018-03-08", 2018, 3, "https://www.federalregister.gov/documents/2018/03/08/2018-04577/revocation-of-class-e-airspace-centerville-md", "https://www.govinfo.gov/content/pkg/FR-2018-03-08/pdf/2018-04577.pdf", "Transportation Department; Federal Aviation Administration", "492,159", "This action removes Class E airspace extending upward from 700 feet above the surface at Centerville, MD. Because the Maryland State Police Trooper 6 Heliport has moved, controlled airspace is no longer required at this location. Another rulemaking...", null]], "columns": ["document_number", "title", "type", "abstract", "publication_date", "pub_year", "pub_month", "html_url", "pdf_url", "agency_names", "agency_ids", "excerpts", "regulation_id_numbers"], "primary_keys": ["document_number"], "primary_key_values": ["2018-04577"], "units": {}, "query_ms": 34.21883215196431, "source": "Federal Register API & Regulations.gov API", "source_url": "https://www.federalregister.gov/developers/api/v1", "license": "Public Domain (U.S. Government data)", "license_url": "https://www.regulations.gov/faq"}