Landlord wants to be named et al as additionally insured in tenants insurance policies

After 7 years of being a good tenant in Ontario, my landlord is asking all tenants to make sure they have comprehensive water with a minimum of $15,000.00 , Liability of 2 million and to name him et al as additionally insured.

Is this legal? my lease from 7 years ago simply says I was required to get tenant insurance. I am most concerned about the "Name him et al as additionally insured" tenant insurance is supposed to be solely for the tenants that live in the apartment.