This sign has just appeared at Melksham Station's car parking area beside the station gate (at the end of the car park away from the gate ... have to walk down to read it ...

Previously (not sure if it has been removed) there was just a sign that said "Free Parking for Station Users".
Questions abound - not only Melksham but odd spaces at places like Avoncliff and other of the really small stations peppered across the South West - where there's a parking space or two and no charge, what's the situation.
Reading the sign, I'm now made aware I may be charged £100 by APCOA▸ if I park over a line ... previously, I was unaware I had a contract with them ... did I?