Section 28-105.4.2.1. Definitions

The  following words and terms shall, for
  the purposes of this section 28-105.4.2 and as used  elsewhere  in  this
  code, have the meanings shown herein.
    MINOR ALTERATIONS. Minor changes or modifications in a building or any
  part thereof, excluding additions thereto, that do not in any way affect
  health  or the fire or structural safety of the building or the safe use
  and operation of the service equipment therein. Minor alterations  shall
  not  include  any  of the work described as "work not constituting minor
  alterations or ordinary repairs."
    ORDINARY REPAIRS. Replacements or  renewals  of  existing  work  in  a
  building, or of parts of the service equipment therein, with the same or
  equivalent  materials  or equipment parts, that are made in the ordinary
  course of maintenance and that do not in any way affect  health  or  the
  fire  or structural safety of the building or the safe use and operation
  of the service equipment therein. Ordinary  repairs  shall  include  the
  repair  or  replacement  of any plumbing fixture, piping or faucets from
  any exposed stop valve to the inlet side of  a  trap.  Ordinary  repairs
  shall  not  include  any of the work described as "work not constituting
  minor alterations or ordinary repairs."
    WORK NOT CONSTITUTING MINOR ALTERATIONS  OR  ORDINARY  REPAIRS.  Minor
  alterations or ordinary repairs shall not include:
    1.  The  cutting away of any load bearing or required fire rated wall,
  floor, or roof construction, or any portion thereof.
    2. The removal, cutting, or modification of any  beams  or  structural
  supports;
    3. The removal, change, or closing of any required exit;
    4.  The addition, rearrangement, relocation, removal or replacement of
  any parts of the building affecting loading  or  exit  requirements,  or
  light,  heat,  ventilation,  or  elevator  requirements or accessibility
  requirements or any fire suppression system;
    5.  Additions  to,  alterations  of,  or  rearrangement,   relocation,
  replacement,  repair  or  removal  of  any  portion  of  a  standpipe or
  sprinkler system, water distribution system, house sewer, private sewer,
  or drainage system, including leaders, or any soil, waste or vent  pipe,
  or any gas distribution system;
    6.  Any plumbing work other than the repair or replacement of plumbing
  fixtures, piping or faucets from the exposed stop  valve  to  the  inlet
  side of a trap;
    7.  The alteration or repair of a sign for which a permit is required;
  or
    8. Any other work affecting health or the fire or structural safety of
  the building or the safe use and  operation  of  the  service  equipment
  therein.