A further deduction from the net value is made, in the first case, of the increase in value acquired by the property during the marriage, proportionately to the ratio existing at the time of the marriage between the net value and the gross value of the property, and, in the second case, of the increase in value acquired since the contribution, proportionately to the ratio existing at the time of the contribution between the value of the contribution and the gross value of the property.
Reinvestment during the marriage of property included in the family patrimony that was owned at the time of the marriage gives rise to the same deductions, adapted as required.
[1991, c. 64, a. 418].

