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2026

Archived version 1 of 2. This is how the model read before it was corrected. It is shown read only. The current version is here.

NASA Open Source Agreement 1.3

Also known as NASA Open Source Agreement, NASA Open Source Agreement 1.3, NASA-1.3, NOSA, NOSA 1.3.

Commercial use
allowed
Share alike
required
Attribution
required (keep the copyright and license notices)
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Canonical URI https://dalicc.net/licenselibrary/NASA-1.3

Permissions

  • Charge distribution fee from the text Charging a fee for the act of providing a copy of the work to someone else.
  • Commercial use from the text Using the work to generate income, directly or indirectly, for example by selling it or by using it in advertising.
  • Derivative works from the text Distributing an adaptation of the work and making it available to the public.
  • Derive from the text Creating a new work from the work, such as a translation, adaptation or arrangement of it or of a part of it.

    Duties

    • Add statement from the text Attaching terms, notices or statements of one's own to the work or to one's modifications when passing it on.
    • Attribution from the text Giving credit to the copyright holders or authors of the work, in the form the licensor asks for.
    • Include notice file from the text Carrying a named notice file of the original work into every redistributed copy and every derivative work.
    • Modification notice from the text Marking a changed work as changed, saying how it differs from the original and keeping earlier notices of change.
    • Notice from the text Notice: keeping the license and copyright notices with every copy.
  • Display from the text Showing the work to the public without making a copy the viewer keeps.
  • Distribute from the text Providing copies of the work to the public or to anyone else.

    Duties

    • Add statement from the text Attaching terms, notices or statements of one's own to the work or to one's modifications when passing it on.
    • Attribution from the text Giving credit to the copyright holders or authors of the work, in the form the licensor asks for.
    • Export control notice from the text Complying with the export and import laws that reach the work, and passing the notice of them on to every recipient.
    • Notice from the text Notice: keeping the license and copyright notices with every copy.
    • Recipient registration request from the text Asking, without requiring, that a recipient register as a user of the work and report the modifications they make to it, so that the steward can keep a record.
    • Source code from the text Providing access to the source code of the work with every copy distributed.
  • Modified works from the text Distributing a modified version of the work that does not amount to a new, derivative work.
  • Modify from the text Altering the work, for example by updating it, without creating a new work; an alteration that creates a new work is Derive.

    Duties

    • Add statement from the text Attaching terms, notices or statements of one's own to the work or to one's modifications when passing it on.
    • Attribution from the text Giving credit to the copyright holders or authors of the work, in the form the licensor asks for.
    • Include notice file from the text Carrying a named notice file of the original work into every redistributed copy and every derivative work.
    • Modification notice from the text Marking a changed work as changed, saying how it differs from the original and keeping earlier notices of change.
    • Notice from the text Notice: keeping the license and copyright notices with every copy.
  • Patent grant from the text Granting a license under the patent claims that a contributor holds and that the contribution necessarily infringes.
  • Present from the text Performing the work in public, including by broadcast or other communication to the public.
  • Reproduce from the text Making copies of the work in any form.

Prohibitions

  • Change license from the text Not permitted: Change license. Replacing the license of the work, or of an adaptation, with another license, or changing its terms.
  • Promote from the text Not permitted: Promote. Using the name or trademarks of the licensor or of contributors to endorse or promote a product.

License-wide duties

  • Share alike from the text Adaptations have to be licensed under the same license or one the license names as compatible.

Further terms

These are the things the license says about itself beyond the acts it permits, forbids and requires: when it ends, how long there is to put a breach right, which law governs it, and so on. A term that comes from the DALICC vocabulary links to its definition.

Cure period
30 days
Governing law
United States federal law
Terminates on breach
Yes

Clauses

Warranty disclaimer

No Warranty: THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF ANY KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL BE ERROR FREE, OR ANY WARRANTY THAT DOCUMENTATION, IF PROVIDED, WILL CONFORM TO THE SUBJECT SOFTWARE. THIS AGREEMENT DOES NOT, IN ANY MANNER, CONSTITUTE AN ENDORSEMENT BY GOVERNMENT AGENCY OR ANY PRIOR RECIPIENT OF ANY RESULTS, RESULTING DESIGNS, HARDWARE, SOFTWARE PRODUCTS OR ANY OTHER APPLICATIONS RESULTING FROM USE OF THE SUBJECT SOFTWARE. FURTHER, GOVERNMENT AGENCY DISCLAIMS ALL WARRANTIES AND LIABILITIES REGARDING THIRD-PARTY SOFTWARE, IF PRESENT IN THE ORIGINAL SOFTWARE, AND DISTRIBUTES IT "AS IS."

Limitation of liability

Waiver and Indemnity: RECIPIENT AGREES TO WAIVE ANY AND ALL CLAIMS AGAINST THE UNITED STATES GOVERNMENT, ITS CONTRACTORS AND SUBCONTRACTORS, AS WELL AS ANY PRIOR RECIPIENT. IF RECIPIENT'S USE OF THE SUBJECT SOFTWARE RESULTS IN ANY LIABILITIES, DEMANDS, DAMAGES, EXPENSES OR LOSSES ARISING FROM SUCH USE, INCLUDING ANY DAMAGES FROM PRODUCTS BASED ON, OR RESULTING FROM, RECIPIENT'S USE OF THE SUBJECT SOFTWARE, RECIPIENT SHALL INDEMNIFY AND HOLD HARMLESS THE UNITED STATES GOVERNMENT, ITS CONTRACTORS AND SUBCONTRACTORS, AS WELL AS ANY PRIOR RECIPIENT, TO THE EXTENT PERMITTED BY LAW. RECIPIENT'S SOLE REMEDY FOR ANY SUCH MATTER SHALL BE THE IMMEDIATE, UNILATERAL TERMINATION OF THIS AGREEMENT.

Accepting warranty or additional liability

A Recipient may choose to offer, and to charge a fee for, warranty, support, indemnity and/or liability obligations to one or more other Recipients of the Subject Software. A Recipient may do so, however, only on its own behalf and not on behalf of Government Agency or any other Recipient. Such a Recipient must make it absolutely clear that any such warranty, support, indemnity and/or liability obligation is offered by that Recipient alone. Further, such Recipient agrees to indemnify Government Agency and every other Recipient for any liability incurred by them as a result of warranty, support, indemnity and/or liability offered by such Recipient.

Additional clauses

The rights granted in Paragraphs A. and B. allow the Recipient to sublicense those same rights. Such sublicense must be under the same terms and conditions of this Agreement.

Info

Target asset types
Software
Region / jurisdiction
Worldwide
Validity
Perpetual
Source
https://opensource.org/license/NASA-1.3
Legal code
http://ti.arc.nasa.gov/opensource/nosa/
This description is published under
https://dalicc.net/licenselibrary/CC-BY-4.0
SPDX identifier
NASA-1.3 on the SPDX license list
DALICC identifier
NASA-1.3

This record is published under CC BY 4.0. Credit it as: DALICC License Library, DALICC - Verein zur Förderung der Rechtssicherheit in der Datenbewirtschaftung, https://dalicc.net, CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). The license it describes belongs to its publisher.

History

This license model has 2 versions. Version 2 is the one served today; every earlier version keeps its own address, so a conclusion drawn from one of them can still be checked against it.

  1. Version 2 current2026-09-24 Giray Havur

    The changes since version 1 recorded which sentence of the text each statement rests on and named the license the record itself is published under.

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    5 changes

    • changed duty cc:ShareAlike

      was duty cc:ShareAlike

      Manual edit The statement now quotes the sentence of the licence text it rests on: "A. Distribution or Redistribution of the Subject Software must be made under this Agreement except for additions covered under paragraph 3H."

    • changed permission odrl:derive with duties [cc:Attribution, cc:Notice, dalicc:addStatement, dalicc:includeNoticeFile, dalicc:modificationNotice]

      was permission odrl:derive with duties [cc:Attribution, cc:Notice, dalicc:addStatement, dalicc:includeNoticeFile, dalicc:modificationNotice]

      Manual edit The statement now quotes the sentence of the licence text it rests on; the record carries it as dalicc:evidence.

    • changed permission odrl:modify with duties [cc:Attribution, cc:Notice, dalicc:addStatement, dalicc:includeNoticeFile, dalicc:modificationNotice]

      was permission odrl:modify with duties [cc:Attribution, cc:Notice, dalicc:addStatement, dalicc:includeNoticeFile, dalicc:modificationNotice]

      Manual edit The statement now quotes the sentence of the licence text it rests on; the record carries it as dalicc:evidence.

    • changed prohibition dalicc:promote

      was prohibition dalicc:promote

      Manual edit The statement now quotes the sentence of the licence text it rests on: "E. A Recipient may not make any representation in the Subject Software or in any promotional, advertising or other material that may be construed as an endorsement by Government Agency or by any prior Recipient of any product or service provided by Recipient, or that may seek to obtain commercial advantage by the fact of Government Agency's or a prior Recipient's participation in this Agreement."

    • added dct:license <https://creativecommons.org/licenses/by/4.0/>

      Manual edit Every record is published under CC BY 4.0. cc:license names the record DALICC keeps of that licence; dct:license now names it by the address Creative Commons publishes it at, so that a consumer matching the canonical IRI finds it.

  2. Version 1

    Created from the license text on 2026-09-15 (Reciprocal and source-available).

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Every change names the reason behind it: a finding of the content review, one of its library-wide decisions, the metadata that review wrote onto every record, or a hand edit. None of it is legal advice.

Nothing on this page is legal advice. What a license means is decided by its text; ask a legal advisor before you rely on it.