Section 27-292.4. General requirements

--(a) This subarticle shall apply to
  all buildings or portions thereof and their accessory areas,  except  as
  specified in this subarticle.
    (b)  The  provisions  of  this subarticle shall be supplemental to and
  take precedence over less restrictive provisions of  this  code  in  the
  following  articles  and  sections  and  in  their  referenced  national
  standards:
    (1) Subchapter four, building limitations
    a. § 27-308 ramps
    (2) Subchapter six, means of egress
    a. § 27-357 (d) building access
    b. § 27-371 (e) door opening width
    c. § 27-377 ramps
    (3) Subchapter seven, special uses and occupancies
    a. Article ten, public garages
    b. Article eleven, open parking structures
    c. Article thirteen, open parking lots
    d. Article fifteen, swimming pools
    (4) Subchapter eight, places of assembly
    a. § 27-531 Seating in assembly spaces
    (5) Subchapter sixteen, plumbing and gas piping
    a.  Reference  standard  RS-16,  paragraph  (c)  of   section   P104.1
  Facilities for physically handicapped
    b.   Reference   standard  RS-16,  paragraph  (d)  of  section  P104.1
  accessibility
    (6) Subchapter seventeen,  fire  alarm,  detection  and  extinguishing
  equipment
    c. Article six smoke detecting devices
    (7) Subchapter eighteen, elevators and conveyors
    a. Reference standard RS 18-1
    (c)  Facilities  in existence on the effective date of this subarticle
  which comply with the  requirements  of  this  subarticle  or  of  other
  provisions  of  this  code  relating  to the provision of facilities for
  people with physical disabilities shall not be diminished to  less  than
  those  which would be required were the building in which the facilities
  are located hereafter erected.