The Stewart B. McKinney Homeless Assistance Act, as amended in 1992 by Public Law
            102-550, provides for low-cost housing known as “safe havens” to certain homeless persons. The law provides exceptions to two SSI provisions for
            demonstration project participants:
         
         
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                     ineligibility due to residence in a public institution, and 
 
 
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                     chargeable in-kind support and maintenance.