The employer pays it for both part and full-time workers. The rates differ by province, but generally this works out two weeks of wages for the first few years with an employer - they can increase this if they want but that's the legal minimum.

In practice this just means that you can take two weeks and still get paid. You can forgo your vacation in some instances, but you still get paid out the vacation money. I used to do that when I worked part-time in college and was short of cash for whatever reason.

Ontario's rules - https://www.ontario.ca/document/your-guide-employment-standa...