The main purpose of this legislation is to simplify the process for critical access hospitals to provide inpatient services under Medicare. Specifically, it aims to eliminate the requirement that a physician must certify a patient's need for inpatient care within 96 hours of their admission. This change is intended to improve access to necessary medical services for patients in rural areas where critical access hospitals are often located. Key provisions of the law include the removal of the 96-hour physician certification requirement for inpatient services at critical access hospitals.