"The International Building Code (IBC) is a model building code developed by the International Code Council (ICC). It has been adopted for use as a base code standard by most jurisdictions in the United States.[1][2] The IBC addresses both health and safety concerns for buildings based upon prescriptive and performance related requirements. The IBC is fully compatible with all other published ICC codes. The code provisions are intended to protect public health and safety while avoiding both unnecessary costs and preferential treatment of specific materials or methods of construction.[3]
However, a 2019 New York Times story revealed a secret agreement with the National Association of Home Builders that allowed the industry group, which represents the construction industry, to limit improvements in the code that would make buildings more environmentally sustainable and resistant to natural disasters, prompting a congressional investigation.[4][5][6] The ICC, in response to a Congressional inquiry, vehemently denied the characterization of the agreement, noting, "While home builders are among [our code development] partners, they do not have disproportionate control of the Code Council's model code development process. On the contrary, volunteer government officials with experience and expertise exercise by far the most control in the process."[7]" (https://en.wikipedia.org/wiki/International_Building_Code)
Link to the ICC Site https://codes.iccsafe.org/
In some areas local codes may take precedence over the IBC.
"The UBC was first published in 1927 by the International Conference of Building Officials, which was based in Whittier, California. It was intended to promote public safety and provided standardized requirements for safe construction which would not vary from city to city as had previously been the case.[1]
Updated editions of the code were published approximately every three years until 1997, which was the final version of the code. The UBC was replaced in 2000 by the new International Building Code (IBC) published by the International Code Council (ICC). The ICC was a merger of three predecessor organizations which published three different building codes.[2] These were:
International Conference of Building Officials (ICBO) Uniform Building Code
Building Officials and Code Administrators International (BOCA) The BOCA National Building Code
Southern Building Code Congress International (SBCCI) Standard Building Code
The new ICC was intended to provide consistent standards for safe construction and eliminate differences between the three different predecessor codes. It is primarily used in the United States."
Source: https://en.wikipedia.org/wiki/Uniform_Building_Code