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7-Zip Rule

Modified LGPL files must carry prominent notices of the change and its date, and a modified work must itself be a library

Catalog row in Vendor License Rules · Cited

Kind
Compliance
Statement
GNU LGPL 2.1 §2 (February 1999): a modified work based on the Library may be distributed only if it is itself a software library, the modified files carry prominent notices stating that they were changed and the date of any change, and the whole work is licensed under the LGPL.
Applies when
Distributing a modified 7-Zip library or modified source files.
Applies to
Modified versions of LGPL-licensed 7-Zip code.
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