AbilityOne Improvements Act - Requires lease agreements for providing space to a federal agency to require the federal agency, lessor, or property manager to comply with provisions of the Javits-Wagner-O'Day Act (requiring employment in federal buildings for the blind and for people with significant disabilities) if the lease is for 60% or more of useable space on the property or the federal agency that is to be accommodated under the lease is required to contract under such Act for services being transitioned to the leased space.