Independent and Objective Oversight of Ukrainian Assistance Act The bill establishes the Office of the Special Inspector General for Ukrainian Military, Economic, and Humanitarian Aid. The office's duties shall include (1) conducting and coordinating audits and investigations of the handing of funds made available for aid to Ukraine, and (2) monitoring and reviewing contracts and activities involving those funds. The Special Inspector General shall report directly to, and be under the general supervision of, the Secretary of State and Secretary of Defense. Federal agencies may not prevent the office from carrying out any audit or investigation related to aid to Ukraine. The office shall terminate 180 days after the date on which there is less than $250 million in unexpended amounts that were made available for the reconstruction of Ukraine.