Section 20. Practice before the commission; immunity of witnesses

1. All
  hearings before the commission or  a  commissioner,  or  an  officer  or
  employee  specially  authorized  to conduct an investigation or hearing,
  shall be  governed  by  rules  to  be  adopted  and  prescribed  by  the
  commission.    And  in  all  investigations,  inquiries  or hearings the
  commission or a  commissioner,  or  an  officer  or  employee  specially
  authorized to conduct an investigation or hearing, shall not be bound by
  the technical rules of evidence.
    2.  In  any investigation or inquiry by or upon any hearing before the
  commission or any commissioner, or  an  officer  or  employee  specially
  authorized  to  conduct an investigation or hearing, the commission, any
  commissioner or the officer conducting the investigation or hearing  may
  confer  immunity  in  accordance with the provisions of section 50.20 of
  the criminal procedure law.