If they are VERY professional, they will have their processes in writing as verification that it is enforced equally and fairly by their entire staff. 6.

Generally speaking, contracts aren't enforceable if they contradict written law.

There may be old covenants or HOA rules that haven't been enforced in years, but could be if an irate neighbor decided to pursue it. 

If the courts for instance say that Prince Georges County cant enforce their pitbull ban on its citizens with pitbull service animals, how do you think a court would find in your case?

CO by code enforcement (on new lease)3.

Yes, have an attorney review the lease to make sure it conforms with your state and local laws and will be enforceable.

If not call code enforcement.

Not using a PM for me is not about saving the management fees, and it has to do with the unacceptable services I received from PMs from poor screening, no lease enforcement and not follow owner's directions, serious damages. 

Very strict city government in terms of having to continually renew rental certificate, occupancy limits, strict zoning enforcement, mandatory inspections for rentals etc.

Do yourself a favor and obtain council before contacting the police, FBI or any other enforcement agency.