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Re:Copyleft terms may become unenforceable in 11 countries d... by jcranmer on Thursday June 14, 2018 @03:38PM (#17314695)
The third clause explicitly states "Nothing in this Article shall preclude: (a) the inclusion or implementation of terms and conditions related to the provision of source code in commercially negotiated contracts;"

That is to say, the article is explicitly not prohibiting countries from enforcing copyleft licenses.

Re:Copyleft terms may become unenforceable in 11 countries d... by dragonwriter on Thursday June 14, 2018 @09:31PM (#17316826)
Most copyleft licenses are not, in the manner normally entered into, “commercially negotiated contracts”, and many are gratuitous licenses, not contracts at all.
Re:Copyleft terms may become unenforceable in 11 countries d... by jcranmer on Friday June 15, 2018 @03:52PM (#17322969)
Licenses are contracts, legally speaking.
Re:Copyleft terms may become unenforceable in 11 countries d... by dragonwriter on Friday June 15, 2018 @11:07PM (#17325588)
No, they aren't. Licenses are legal permission, which may either be unilateral and gratuitous with no exchange, or mutual as a (part of a) contract.