One channel's answer from the scoped level: a value, or nothing, and whether a locked Deny stands.
True when any in-scope row denies this channel with IsLocked: nothing below may turn it on.
IsLocked
The most specific non-null answer, Deny winning a tie; null when no in-scope row speaks to this channel.
One channel's answer from the scoped level: a value, or nothing, and whether a locked Deny stands.