Which law regulated domestic use, sale, and transfer of opium and coca products?

• A. Marijuana Tax Act of 1937
• B. Boggs Act of 1951
• C. Controlled Substances Act of 1970
• D. Harrison Act of 1914

Answer: (D)

The main idea tested is how the government first controlled opium and coca products domestically through taxation and licensing rather than outright prohibition. The Harrison Narcotics Tax Act of 1914 established this framework by imposing a tax on the production, importation, and distribution of opium and coca products and by requiring those handling these substances to register, keep records, and comply with tax requirements. This effectively created a licensing regime: only those who met the tax and registration rules could legally deal in these substances, and noncompliance meant penalties. It didn’t ban possession outright, but the tax system greatly restricted who could legally obtain and transfer opium and coca products, shaping enforcement and access for years to come. Later laws broadened or shifted the approach—for example, later acts targeted specific substances, increased penalties, or created scheduling—but the Harrison Act was the first to regulate domestic use, sale, and transfer of opium and coca products through taxation and licensing.