The Hemp Economic Mobilization Plan Act of 2025, or HEMP Act, proposes significant changes to the Agricultural Marketing Act of 1946 regarding hemp regulation. Its primary provision is to redefine hemp by increasing the permissible delta-9 tetrahydrocannabinol (THC) concentration from 0.3 percent to 1 percent on a dry weight basis. The bill also introduces more precise requirements for testing delta-9 THC levels, specifying that the measurement of uncertainty must not exceed 0.075 percent, and these standards will apply to "products derived from hemp plants." Additionally, it establishes new documentation requirements for the transportation of hemp, mandating that transporters carry either a valid producer's license or a laboratory certificate confirming the hemp's THC concentration is not more than 1 percent. Finally, the legislation directs the Secretary of Agriculture to make necessary conforming revisions to federal regulations (7 CFR part 990) within 90 days of enactment, bypassing standard notice and comment procedures to expedite implementation.