The Government shall provide Interest Free Loans to qualified individuals or families as second mortgage loans subordinated to first mortgage loans made by GHC for the purchase or construction of a Home. Interest Free Loans shall be available to each family or individual based on the family’s or individual’s adjusted income which shall be determined at the time of application and in accordance with the schedule set out in § 4307 of this Article. All loans so made shall be of such sound value, including credit-worthiness or so secured as to reasonably assure repayment.