This bill amends title 38, United States Code, to establish new presumptions for veterans who served at the Nevada Test and Training Range. It designates onsite participation in military installation activities at specific covered locations within the Range between January 1, 1972, and January 1, 2005, as a radiation-risk activity . This provision aims to simplify the process for veterans seeking disability benefits related to radiation exposure by creating a direct link between their service and potential health issues. Additionally, the bill creates a presumption of toxic exposure for veterans who performed active military service in or above these specific covered locations during the same timeframe. These covered locations include Indian Springs Auxiliary Airfield but explicitly exclude Nellis Air Force Base and Creech Air Force Base. For veterans falling under this toxic exposure presumption, the bill also establishes a presumption of service connection for lipomas and tumor-related conditions, streamlining their access to necessary care and compensation from the Department of Veterans Affairs.