here is the link to the ESA contractor page.

http://www.esaecra.info/site/index.php

To be eligible for an ECRA/ESA Electrical Contractor Licence the applicant shall;
In the case of an individual, be at least 18 years of age;
Be a Master Electrician, or employ at all times at least one Designated Master Electrician;
Have an address for service;
Have public liability and property damage insurance coverage of at least $2,000,000;
Be registered with the Workplace Safety and Insurance Board, if the applicant is required to register under the Work Place Safety and Insurance Act, 1997;
Not be in default of filing a return with the Minister of Finance or of paying any tax, penalty or interest assessed under the Retail Sales Tax Act or the Corporations Tax Act, if applicable, for which payment arrangements have not been made; and
Not owe the ESA any money for which payments arrangements have not been made.