According to this tutorial of
regulator is able to view the result of voting.
1) What else responsibilities does regulator have?
2) How is the regulator selected from the participants of the blockchain network?
3) How are new participants and nodes added to the private permissioned network?
4) Does the regulator have the right to add participants to the private permissioned blockchain network? If yes, isn't it a politically centralized system? To read more about political decentralization read this post by Vitalik.
5) Are all private permissioned network are infrastructurally decentralized, politically centralized and logically centralized systems.