
Overall license:
================
The actual X-13ARIMA-SEATS binary is provided under these terms

  License Information and Disclaimer (March 1, 2016):

  This Software was created by U.S. Government employees and therefore is not
  subject to copyright in the United States (17 U.S.C. §105). The United
  States/U.S. Department of Commerce (“Commerce”) reserve all rights to seek and
  obtain copyright protection in countries other than the United States. The
  United States/Commerce hereby grant to User a royalty-free, nonexclusive
  license to use, copy, and create derivative works of the Software outside of
  the United States.

  The Software is provided to the User and those who may take by, through or
  under it, “as is,” without any warranty (whether express or implied) or
  representation whatsoever, including but not limited to any warranty of
  merchantability. The Software is taken hereunder without any right to support
  or to any improvements, extensions, or modifications, except as may be agreed
  to separately, in writing, by Commerce.

  User, on behalf of itself and all others who take by, through or under it,
  hereby and forever waives, releases, and discharges the United States/Commerce
  and all its instrumentalities from any and all liabilities and obligations in
  connection with the use, application, sale or conveyance of the Software. User
  shall indemnify and hold harmless the United States/Commerce and its
  instrumentalities from all claims, liabilities, demands, damages, expenses,
  and losses arising from or in connection with User's use, application, sale or
  conveyance of the Software, including those who take by, through or under User
  whether or not User was directly involved. This provision will survive
  termination of this Agreement and will include any and all claims or
  liabilities arising under intellectual property rights, such as patents,
  copyrights, trademarks, and trade secrets. If User of software is an Executive
  Agency of the United States, this clause is not applicable.

  The construction, validity, performance, and effect of this Agreement for all
  purposes will be governed by Federal law of the United States.

  User agrees to make a good faith effort to use the Software in a way that does
  not cause damage, harm, or embarrassment to the United States/Commerce. The
  United States/Commerce expressly reserve all rights and remedies.

The integration into an R package has been provided by Dirk Eddelbuettel and
Christoph Sax, and is licensed under the terms of the GNU GPL, version 2 or
later, just like R itself.

Details:
========

Files: *
Copyright: 2015 - 2016  Dirk Eddelbuettel and Christoph Sax
License: GPL (>= 2)

Files: inst/bin/x13*:
Copyright: This Software was created by U.S. Government employees and therefore 
  is not subject to copyright in the United States (17 U.S.C. §105). The United
  States/U.S. Department of Commerce (“Commerce”) reserve all rights to seek and
  obtain copyright protection in countries other than the United States. The
  United States/Commerce hereby grant to User a royalty-free, nonexclusive
  license to use, copy, and create derivative works of the Software outside of
  the United States.
License: See above, and https://www.census.gov/srd/www/x13as/
