Which of the following statements are correct?
1. In 2003 the ILO adopted a global strategy to improve occupational safety and health which included the introduction of a preventive safety and health culture.
2. It has adopted more than 40 standards specifically dealing with occupational safety and health, as well as over 40 Codes of Practice.
3. ILO's Codes of Practice are not legally binding instruments.
4. ILO's Codes of Practice are not intended to replace the provisions of national laws or regulations, or accepted standards.