Consider the following statements about the Pradhan Mantri Surakshit Matritva Abhiyan (PMSMA):

1. It provides free, fixed-day (the 9th of every month) antenatal check-ups to pregnant women in their second and third trimesters.

2. It also provides a mandatory six-month postnatal care package to all its beneficiaries.

3. Private-sector doctors can voluntarily register to provide these services alongside government doctors.

Which of the statements given above is/are correct?