Zander suggested that BIPs should be public domain (CC0) or have a CC-BY option. Falke agreed but questioned why Zander chose to license BIP 134 under OPL and CC-BY-SA. Zander explained that he dual-licensed it so that if the CC-BY-SA was accepted in the future, users could remove the OPL without needing permission from all authors. Falke pointed out that BIP 2 does not allow PD as the only copyright option, to which Zander responded that PD was never the only option.