Section 1600. Provisions of chapter uniform throughout state

The provisions
  of  this  chapter  shall be applicable and uniform throughout this state
  and in all political subdivisions  and  municipalities  therein  and  no
  local  authority shall enact or enforce any local law, ordinance, order,
  rule or regulation in conflict  with  the  provisions  of  this  chapter
  unless  expressly  authorized  herein. No local authority shall enact or
  duplicate any provision of this  chapter  as  a  local  law,  ordinance,
  order, rule or regulation, except that any local authority authorized to
  supersede  any provision of this chapter may enact any such provision in
  a modified or amended form.