Is that enforceable?
You could ask Brendan Eich.
http://www.forbes.com/sites/quora/2014/04/11/did-mozilla-ceo-brendan-eich-deserve-to-be-removed-from-his-position-due-to-his-support-for-proposition-8/#60d0ebe52a5c
http://www.nationalreview.com/corner/374734/mozilla-employees-call-ceo-be-fired-donating-prop-8-campaign-alec-torres