The Secretary may obtain from any person whose activities relate to weather modification by rule, subpena, or otherwise such information in the form of testimony, books, records, or other writings, may require the keeping and furnishing of such reports and records, and may make such inspection of the books, records, and other writings and premises and property of any person as may be deemed necessary or appropriate by him to carry out the provisions of this chapter, but this authority shall not be exercised to obtain any information with respect to which adequate and authoritative data are available from any Federal agency.
In case of contumacy by, or refusal to obey a subpena served upon any person pursuant to this section, the district court of the United States for any district in which such person is found or resides or transacts business, upon application by the Attorney General, shall have jurisdiction to issue an order requiring such person to appear and give testimony or to appear and produce documents, or both; and any failure to obey such order of the court may be punished by such court as a contempt thereof.