Fair housing law exemptions

[Jack B.]

They say you are exempt if you own less than four single family houses, live in a multi family with less than 4 units or rent properties without the use of a realtor, etc.

What if you own more than 3 houses, are a realtor (part time) and renting out a portion of your house like a MIL apartment?

They don't really specify that if you own more than 3 houses that the multi family rule doesn't apply or that if YOU'RE the realtor, the rules still don't apply. It doesn't specify whether the rules apply singularly or in combination.