Niches shall be designed and constructed in accordance with Section 460.9.
Niches shall have a minimum volume of 200 cubic inches (7 m3) with a minimum width of 41/2 inches (114.3 mm), a minimum height of 9 inches (228.6 mm), and a minimum depth of 5 inches (127 mm).
Niches shall not require pressure relief systems.
Niche wall thickness shall be the thickness as dictated at the time of construction by modern mausoleum and columbarium construction.