; and (B) a combination of prohibitions or restrictions on overflights within airspace under a State, local, or Tribal government’s jurisdiction such that it is nearly impossible for civil unmanned aircraft to reach the navigable airspace. (b) Rules of construction Nothing in subsection (a) may be construed to prohibit a State, local, or Tribal government from— (1) adopting, maintaining, or enforcing laws, rules, or standards that regulate unmanned aircraft systems below 200 feet above ground level; or (2) prescribing emergency procedures for a civil unmanned aircraft system descending into an area 200 feet above ground level. 7. Updates to rules regarding the commercial carriage of property (a) Improving regulations Section 44808 of title 49, United States Code, is amended— (1) by redesignating subsection (b)(5) as subsection (c), and indenting appropriately; (2) by redesignating subparagraphs (A), (B), and (C) of subsection (c), as redesignated by paragraph (1), as paragraphs (1), (2), and (3), respectively, and indenting appropriately; (3) by redesignating subsection (b)(6) as subsection (d), and indenting appropriately