CHOP is one of the four primary reference documents the 2026 ExAC Preparation Guide names for the exam as a whole. The guide does not map references to individual categories, so the alignment on this page is Examitect's own: we lean on CHOP most heavily for every category in Section 4 (Construction and practice), and treat it as supporting reading for Section 1 (Design and analysis) and Section 3 (Sustainability and final project). If a question asks who holds the contract, what the architect's obligations are during construction, how fees are typically structured, or how to handle a change order, the answer almost always traces back to a CHOP chapter.
The handbook also shapes the language the ExAC uses. Phrases like "general review," "field review," "instrument of service," "prime consultant," and "scope of architectural services" come straight from CHOP and the contracts CHOP discusses. Reading CHOP closely helps you recognize those terms quickly under exam pressure and gives you a vocabulary that matches how the questions are written.
If you only had time to read one architectural-practice reference before the ExAC, CHOP would be it.