This means that serious and demonstrable reasons for restricting the right must be proven by the party attempting to enforce restrictions on rentals, and that all ambiguities and questions of enforce-ability will be resolved by the courts in favor of the free use of the property.

I would be evicting a racist tenant while demonstrating to the other tenants what behavior is acceptable and that our properties will not tolerate tenants that disturb and/or harass other tenants. 

Demonstrate this by how much they've paid in late fees over the past year. 

Standing there one day when asked "How come you have never rented to a (insert protected class here)" by a government inspectorMy answer is very simple "Here is my criteria and I take applicants in order as demonstrated by my records".

So long as they demonstrate intelligence it's fine.

Demonstration that the tenant is a responsible pet owner and requirements to make sure the animals are well cared for!

The tenants guide and house rules also make it clear the tenant would be responsible for this type of call ... unless it could be demonstrated there is an infrastructure failure.Contrary to some practices given here, we do not forbid our tenants from calling our service providers directly - as mention in my original post, we provide them a list (and a call tree).  

Not as good as 28-31% (my sweet spot), but has demonstrated they can pay that amount, if I am reading it right.  

If the landlord's insurance prohibits certain breeds AND if the landlord demonstrates it cannot obtain comparable other insurance at comparable rates, then it may prohibit that breed, even if it is an otherwise allowed companion animal.

Raising their rent $300/year and losing them costs $800 and demonstrates that the owner doesn't comprehend the actual purpose of their business: to make money.