SACRAMENTO, Calif. — The Obama administration on Wednesday broadened an exemption for American Indians from the new health care law's requirement that virtually every U.S. resident has health insurance starting next year. New rules clarify that people who are eligible to receive medical care through the federal Indian Health Service will be exempt from the requirement to have health insurance or face fines from the Internal Revenue Service. The Indian Health Service, a division of U.S. Health and Human Services, oversees a network of clinics that are required through treaty obligations to serve all patients of Indian ancestry, even if they cannot document their federal tribal status.