Have you served them with legal notices to comply?

And in an eviction scenario, you need to certify that you've complied with the registration requirement.

Yet the ones I have seen online seem to skirt the issue entirely and clearly are not complying. 

You will have maintenance issues, late payments, Section 8 inspections, taxes, and if your properties are vacant the city will make sure you comply with grass cutting, etc and bill you for it.Property management is one of the most important items on your list. 

Frankly aside from doing some work arounds  like this I would think you can place a legal demand to comply by serving the demand, a lawyer might advise how you do this.

I agree, that is why it is nice to work with someone who has hired the attorneys and real estate professionals who comply with Dodd-Frank, most investors don’t have the time or money to do this.

You have to comply with the HOA and pay it, it's not a good rental to go for.

Second, "there is no way around compliance, as loopholes", nor did I suggest there was and I really don't appreciate the insinuation, however, using the methodology and structure I'm using, there's nothing to comply with since the Act doesn't apply. 

Most seem to have no clue about complying with Dodd Frank or other consumer mortgage regulations.

Of course, your efforts to force them to comply may backfire if they decide to move out.2) Let it slide.