Synopsis As Introduced Amends the Illinois Act on the Aging. Defines "greatest social need" for the purpose of a specified rule. Makes a conforming change. Amends the Assisted Living and Shared Housing Act. Prohibits unlawful discrimination by an owner, licensee, administrator, employee, or agent of an assisted living establishment of residents in assisted living establishments. Provides that unlawful discrimination does not include an action by an owner, licensee, administrator, employee, or agent that is required by the Act or rules adopted under the Act. Effective immediately.