NSO doesn't exist anymore. According to the PSA the following is what is needed
Information to be provided for the issuance of Birth Certificate:
1 Complete name of the child (first, middle, last)
2 Complete name of the father
3 Complete maiden name of the mother
4 Date of birth (month, day, year)
5 Place of birth (city/municipality, province)
6 Whether or not registered late. (If registered late, please state the year when it was registered.
7 Complete name and address of the requesting party
8 Relationship to the child
9 Number of copies needed
10 Purpose of the certification