Treatment of Income on Owner occupied Property?

The local government organisation supplements its income by buying and selling property. The housing department regularly sells part of its housing inventory in the ordinary course of its operations as a result of changing demographics. Part of the inventory, which is not held for sale, is to provide housing to low-income employees at below market rental. The rent paid by employees covers the cost of maintenance of the property. First part of the inventory will be treated as per IAS 2 and second as per IAS 16 , but how are we going to account for the rent paid by employees on property held under IAS 16??