Tenants in common and joint tenancy refer to residential real estate. In commercial real estate the contract is what matters and Landlord Tenancy laws are far different.
Now I don't know what you are talking about when you say "partnership laws on commercial property....
Are you a partner with a tenant maybe you own a small business together or do you own a commercial piece of property with a partner and each own a percentage of the property.
If either of these things encompass something you may be asking about your really talking about business law and contract law.
You have to be more specific in what exactly it is you want to find out about.

