I'm not sure the sign is misleading at all. There is a hierarchy of signs, with the main one at the top
1.It is a bay for charging EVs only
2.Any motorist with or without a permit and with an EV can park there between 9am to 7pm to charge his vehicle, but can only do it for a maximum of 4 hours within that time. So if you turn up to charge at 6pm, you can only charge for one hour.
3.Outside the hours permitting anybody to charge their EV, only permit holders with an EV can do so, and don't have a limit in those hours.
The yellow sign points out that the vehicle must be charging when parked there, it cannot just be used as a parking bay despite it being an EV.
The only thing I would take issue with is "actively charging". What does it mean; the vehicle must be not just coupled up to the charger, but must be drawing current, or just coupled-up ? If the former, the implication is that the driver must sit with the vehicle the whole time to make sure he knows when it's charged so he can avoid a PCN for not charging.
