The 2021 International Code Interpretation book contains past committee interpretations on the Building, Residential, Fire, Mechanical, Fuel Gas, Plumbing, Existing Building, Energy Conservation, and Swimming Pool and Spa Codes. The interpretations have been edited for applicability to the 2021 International Codes. To easily find an interpretation, the book is organized by code and code section. For convenience, the 2021 text from the applicable International Code is included.