Fill in the form with all the required information. Here's our guide on why you may want to consider hiring in Ontario, as well as some key Ontario labor laws and legislation specific to this province.The Employment Standards Act (ESA) is a law in Ontario that protects workers' rights. This law tells employers how to treat workers fairly. Pregnancy leave: Pregnant employees are entitled up to 17 weeks of unpaid leave. This guide will help you to familiarize yourself with employer regulations in Ontario and the resources that are available for employers. The Employment Standards Act 2000 (ESA) is a legislation used to regulate employment in Ontario. This blog provides a brief overview of Ontario's ESA. An employer may employ a person under the age of 18 years in any office or plant, in any transportation, communication, maintenance or repair service. Out of province companies also need to be licensed if they hire people to work in Ontario.