ยง  11-109.  Municipal regulations. 1. Nothing in this article shall be
  construed as abrogating or impairing the power of  any  municipality  or
  the  secretary  of state to enforce the provisions of any local building
  regulations or the state uniform  fire  prevention  and  building  code,
  provided  that such local building regulations are not inconsistent with
  the code. Nor shall anything in this article be construed as  abrogating
  or  impairing the power of any municipality to promulgate a local energy
  conservation construction code more stringent than the  code,  including
  but  not limited to requirements for mandatory energy efficiency testing
  and ratings.
2.  Any  municipality  which  adopts  a  local   energy   conservation
  construction  code  in accordance with this section shall file a copy of
  such code and any amendments or revisions thereof with  the  state  fire
  prevention   and   building   code  council  within  thirty  days  after
  promulgation or adoption  of  such  local  code  or  any  amendments  or
  revisions  thereof.  If  the  municipality  files  such copy within such
  thirty day time period, the municipality may enforce  such  local  code,
  amendment  or  revision  until  and unless the state fire prevention and
  building code council shall determine that such local code, amendment or
  revision is not more restrictive than  the  code.  If  the  municipality
  fails  to  file  such  copy  within  such  thirty  day  time period, the
  municipality may not enforce such  local  code,  amendment  or  revision
  until  and  unless  the  state fire prevention and building code council
  shall determine that such local code,  amendment  or  revision  is  more
  restrictive than the code.