Consider the following statements related to the Convention 138 of the international labour organization.

1. This convention was developed to regulate child labour by setting a minimum age for admission to employment that the signatories are to respect.

2. This Convention came into force on 19 June 1976.

3. The minimum working age was set at 15 years (13 years for light work). For dangerous work, the Convention set the bar for admission to employment at 18 years (16 years under certain conditions).

Which of the above statement is/are correct?