International Residential Code 2018
International Residential Code for One- and Two-Family Dwellings, (IRC) 2018, International Code Council
This comprehensive code comprises all building, plumbing, mechanical, fuel gas and electrical requirements for one- and two-family dwellings and townhouses up to three stories.
Often this 2018 version is referenced in the PSI Contractor's Bulletin for a number of current contracting exams. Be sure and have the right text for your specific exam.