According to the 1984 Congressional Record, tax rules are generally not written in IRS code and instead evolve through which of the following?

• A. IRS code only.
• B. Court cases, revenue rulings and revenue procedures issued by the IRS.
• C. Legislation by Congress only.
• D. International treaties.

Answer: (B)

Tax rules come to life through interpretation and guidance, not just what’s written in the statute book. The statutory code sets the framework, but real-world application and detail are shaped by how courts interpret those rules and by IRS guidance. Court cases establish precedents that clarify how the code applies in specific situations. Revenue rulings show how the IRS intends to apply the code to particular facts, providing guidance to taxpayers and practitioners. Revenue procedures describe the IRS’s own practices for administering the tax system, detailing how rules are implemented. Taken together, these sources—court decisions, IRS revenue rulings, and revenue procedures—drive the evolution of tax rules over time, more than the code alone.