Deputy Mike O'Hara raised the alarm over the possible introduction of long-term parking fees at any one of 16 car parks, as part of the Vale Commons Council's new 'user pays' policy.
The minister also pledged to broker a deal between the council and the golf clubs at L'Ancresse, with the parties in dispute over plans to impose a steep rent increase.
Planned changes also sparked anger from householders who fear falling property prices after hearing of fresh plans for parking charges at the Vale Church site – less than a year after the courts threw out a terre a l'amende application.
Deputy O'Hara, who believed that any deal between the golf clubs and the council was a long way off, said the council could face stiff opposition to bringing in parking fees.
'I think that would be challenged enormously from a legal point of view,' he said. 'I would have thought it would be very much challenged and not looked at in a good light.'
His warning came as the Vale Commons Council unveiled plans to increase rent paid by the two golf clubs from the current £100 a year combined, to about £90,000 – around 900 times as much.