SpigotMC/Spigot — pull request #98 by Dmck2b (2014-01-22 17:06:19+00:00)
Title: Allow users to bypass vanilla requirements for commandblocks through permissions

Requested by @kangarko at https://github.com/SpigotMC/Spigot-Server/commit/1d0ddcb643f36f4019cec88c9c4764a27ae3feec#commitcomment-5132340

Tested without issues using groupmanager, not familiar with other permissions plugins.