T&C of season tickets say you will comply with the terms of entry. Terms of entry say you will comply with ground regs. Ground/stadium regs (per website) states
19. Persons failing to comply with instructions from a steward or Police Officer or other authorised agent of the Club will be ejected from the ground.
20. PERSONS ARE ADMITTED TO THIS GROUND SUBJECT TO THEIR ACCEPTANCE OF THESE GROUND REGULATIONS AND THE RULES AND REGULATIONS OF THE FOOTBALL LEAGUE / FA PREMIER LEAGUE / RUGBY FOOTBALL LEAGUE. ENTRY TO THE GROUND SHALL CONSTITUTE UNQUALIFIED ACCEPTANCE.
21. THE CLUB MANAGEMENT RESERVES THE RIGHT FOR ITS SERVANTS, AGENTS AND POLICE TO REMOVE FROM THIS GROUND, ANY PERSON WHO DOES NOT COMPLY WITH ALL THESE RULES AND ANY/ALL REGULATIONS, OR COULD REASONABLY BE CONSTRUED AS CONSTITUTING A SOURCE 0F DANGER, NUISANCE OR ANNOYANCE TO ANY OTHER PERSON.