Legitimacy of the children born within 180 days subsequent to marriage

The legitimacy of the child, born within one hundred and eighty days subsequent to the solemnization of marriage, shall not however be challenged: 1. In the case the husband before marrying, had knowledge of the pregnancy of the wife; 2. In case being personally present, he consented that the child be declared as his child in the certificate of birth, or in case, in any other manner, he acknowledged that the child so born was his.