Legal and regulatory challenges associated with AI implementation include dealing with the velocity challenge, ethical challenges, and general legal challenges. The velocity challenge refers to the need for focus and agility in addressing AI regulation, as AI is rapidly evolving and requires a dedicated approach. Ethical challenges in AI implementation include issues related to informed consent, safety and transparency, algorithmic fairness and biases, and data privacy. Legal challenges in the US and Europe include safety and effectiveness, liability, intellectual property, and discrimination. There is a lack of AI-specific regulations and clarification on the application of existing laws, as well as a need for new regulatory bodies to address AI-related issues. Additionally, there are general legal challenges such as the lack of sufficiency of existing national laws and the ambiguity of the term AI itself, which makes it difficult to regulate.