(1) Except as otherwise agreed upon
between the husband and wife, the paternity of a child born to the
wife before one hundred eighty days of the conclusion of marriage
may be denied by the husband and by the successor to the husband
where the husband had already died before the birth of such child.
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(2) Notwithstanding anything contained in sub-section (1),
where a man concludes marriage with a woman with knowledge or
having reasonable ground to know that she was pregnant before the
marriage, the paternity of a child cannot be denied merely on the
ground of his or her birth before that period.