ยง  2503.  Designation of particular insurer, agent, broker or fund for
  insurance provided to discharge statutory requirement. No  person,  firm
  or  corporation  who  or  which  shall  be  the  primary  beneficiary of
  insurance provided in discharge of any  statutory  requirement  of  this
  state,  and  no  representative  of  any  primary  beneficiary  of  such
  insurance, shall require anyone obligated to comply with such  statutory
  requirement,  to  obtain  such  insurance  from  a  particular insurance
  company, insurance fund of this state, agent, or broker.