Thank you for your question.
One of the difficulties with part III is the fact that it sets a number of labour standards relating to a person who receives a salary, whether it involves vacation pay, compensation for stat holidays, overtime and so on.
Because of how part III is structured, it would have been difficult to simply extend all the protections, for example to unpaid interns, because some of these protections would not make sense at that time. It would be impossible for employers to respect these provisions.
The decision was made to adopt a bit of a different approach. It aims mainly to improve protection for everyone, but it recognizes that there are very different circumstances for interns. That is how we improved protections while avoiding more confusion.