Disabled drivers

• Are there any exemptions to road tax?
• Are there any exemptions to wearing a seatbelt?
• I got a fixed penalty notice for parking but I have a disabled badge. What can I do?
• What are the rules in relation to single and double yellow lines?
• What are the rules relating to the use of invalid carriages?
• When can I park on double yellow lines?
• When can I park on single yellow lines?
• Where can disabled people park?