As used in this section:
(a)1. “Marital assets and liabilities” include:
a. Assets acquired and liabilities incurred during the marriage, individually by either spouse or jointly by them.
b. The enhancement in value and appreciation of nonmarital assets resulting from the efforts of either party during the marriage or from the contribution to or expenditure thereon of marital funds or other forms of marital assets, or both.
c. The paydown of principal of a note and mortgage secured by nonmarital real property and a portion of any passive appreciation in the property, if the note and mortgage secured by the property are paid down from marital funds during the marriage. The portion of passive appreciation in the property characterized as marital and subject to equitable distribution is determined by multiplying a coverture fraction by the passive appreciation in the property during the marriage.
(I) The passive appreciation is determined by subtracting the value of the property on the date of the marriage or the date of acquisition of the property, whichever is later, from the value of the property on the valuation date in the dissolution action, less any active appreciation of the property during the marriage as described in sub-subparagraph b., and less any additional encumbrances secured by the property during the marriage in excess of the first note and mortgage on which principal is paid from marital funds.
(II) The coverture fraction must consist of a numerator, defined as the total payment of principal from marital funds of all notes and mortgages secured by the property during the marriage, and a denominator, defined as the value of the subject real property on the date of the marriage, the date of acquisition of the property, or the date the property was encumbered by the first note and mortgage on which principal was paid from marital funds, whichever is later.
(III) The passive appreciation must be multiplied by the coverture fraction to determine the marital portion of the passive appreciation of the property.
(IV) The total marital portion of the property consists of the marital portion of the passive appreciation, the mortgage principal paid during the marriage from marital funds, and any active appreciation of the property during the marriage as described in sub-subparagraph b., not to exceed the total net equity in the property at the date of valuation.