Then again, if you are doing it already, the cost of the extra fence yardage may be minimal.With respect of what they can put in the enclosed area, you can address that in the lease but have to be willing to enforce it (e.g. park a junk car -> start eviction).

There has been some new legislation in the past couple of years and this year, such as the TRACED Act, the STIR/SHAKEN Protocol, the Pallone-Thune Telephone Robocall Abuse Criminal Enforcement and Deterrence Act, etc.

Landlords had too much power, and the limits were enforced by the courts.Our constitutional protections against government taking control over our property without just compensation have been violated.

Most HOAs will govern the tenants use of the unit more strictly than you might (I've had many letters from overzealous HOA officers enforcing bylaws and threatening fines).

It's a City code enforcement officer.

So this overly-aggressive payment scheme this HOA has concocted may not be enforceable.

Whether it is enforced is another question, but if the neighborhood has some NIMBY energy you might get that. i.e.) 

That said, what can I do to enforce this rule? 

I’d call it an appraisal “inspection” when the appraiser visits the property.Just from a legal perspective be "open, honest, transparent" and say what you mean in your contract, & enforce your contract. 

That code enforcement guy - he'll be back.