text: (4) A fixed penalty notice must— 
  
  (a) give reasonably detailed particulars of the circumstances alleged to constitute the offence; 
  (b) state the period during which (because of paragraph (3)(a)) proceedings will not be taken 
  for the offence; 
  
  (c) specify the amount of the fixed penalty in accordance with Schedule 14; 
  (d) state the name and address of the person to whom the fixed penalty may be paid; and 
  (e) specify permissible methods of payment. 
  
  (5) Subject to paragraph (7), whatever other method may be specified under paragraph (4)(e), 
  payment of a fixed penalty may be made by pre-paying and posting to the person whose name is 
  stated under paragraph (4)(d), at the stated address, a letter containing the amount of the penalty 
  (in cash or otherwise). 
  
  (6) Where a letter is sent as described in paragraph (5), payment is regarded as having been 
  made at the time at which that letter would be delivered in the ordinary course of post. 
  
  (7) Paragraph (5) does not apply in the case of— 
  
  (a) an offence under regulation 19(7); or 
  (b) and offence under regulation 19(14) (obstruction) in relation to an offence under 