Obligations of the separate property and of a trade or business

The provisions of section 1463 nos. 2 and 3 do not apply if the obligations are part of the burdens of the separate property which are customarily paid from the income. Nor do the provisions apply if the obligations arise from the operation of a trade or business that is conducted for the account of the common matrimonial property or as the result of a right or of the possession of a thing that belongs to such a trade or business.