The notion really is that it's easier to understand if you put something in the active voice as opposed to the passive voice. I remember once there was an exercise in the mid-eighties for the Standing Orders of the House of Commons and there was also some exercise in reviewing the rules of the Senate. The negative passive voice becomes a bit complex. It didn't really help to understand how the rules are meant to operate.
On April 9th, 2019. See this statement in context.