LIS is released under the terms and conditions of the NASA Open Source Agreement (NOSA) Version 1.3. See https://lis.gsfc.nasa.gov/sites/default/files/LIS/LIS_public_release_7_1rp1/GSC-17531-1_LISF_NOSA.pdf.
Please see the LICENSES sub-directory for the licenses of various components within LIS.