§ 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.