§ 12-3406.  Fines and penalties.
   (1)   Fines for a violation under this Chapter are as follows:
      (a)   When the vehicle exceeds the posted speed limit by 11 miles per hour or more, but by less than 20 miles per hour, one hundred dollars ($100).
      (b)   When the vehicle exceeds the posted speed limit by 20 miles per hour or more, but by less than 30 miles per hour, one hundred twenty-five dollars ($125).
      (c)   When the vehicle exceeds the posted speed limit by 30 miles per hour or more, one hundred fifty dollars ($150).
      (d)   No more than three violation notices establishing fines shall be issued for violations occurring within any thirty-minute period, provided that the notices issued shall be for the violations within such period with the highest corresponding fine amounts.
   (2)   Additional Penalties.
      (a)   Additional penalties for failure to answer a notice of violation by payment of the fine or requesting a hearing regarding the notice of violation are as follows:
         (.a)   twenty dollars ($20) for each notice which remains unanswered for more than 30 days from issuance;
         (.b)   an additional twenty-five dollars ($25) for each notice which remains unanswered for more than 60 days from issuance; and
         (.c)   an additional thirty dollars ($30) for each notice which remains unanswered for more than 90 days from issuance.