Section 37 : Profit and loss made from property and liability:
1) The profit derived by any person from the disposal of any property or liability has to be computed, considering it to be the extent that the sum of the income derived from that property or liability exceeds the sum of the outgoings for that property or liability at the time of disposal.

2) The loss suffered by any person from the disposal of any property or liability has to be computed, considering it to be the extent that the sum of the outgoings for that property or liability exceeds the sum of the income earned from that property or liability at the time of disposal.