The US Department of Commerce's "Framework for Artificial Intelligence Diffusion" interim final rule aims to maintain and strengthen export controls on advanced semiconductors, crucial for maintaining America's compute advantage in AI development. The "Diffusion Rule" establishes export controls on advanced AI chips and model weights worldwide, with a three-tier system based on national security risk. Anthropic has submitted detailed analysis and recommendations to strengthen the rule, focusing on adjusting the tiering system, reducing the no-license compute threshold for Tier 2 countries, and increasing funding for export enforcement. The strategic window for strengthening American export controls is now, as Chinese firms have engaged in aggressive stockpiling ahead of the implementation date, threatening the effectiveness of the rule if delayed further.