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2018 International Residential Code (IRC)
The International Residential Code (IRC) is published by the International Code council (ICC) and accompanies the 2018 B1 Exam Prep Course.
California has adopted 2018 IRC as the 2019 CA Residential Code.
The B1 Residential Building Inspector Certification Exam administered by the ICC is an open-book exam. Exam applicants must provide their own copies of the IRC.