I don't know why, but this is how it works here and the current legislations supports the practice.

I also help recover lost revenue, interview energy thieves, respond to search warrants, attend law enforcement raids to inventory & qualify the equipment present (theft/no theft) and also testify in court as an expert.

Another words you can't enforce that length of lease.

The police can't effectively enforce any drug laws because the county District Attorney doesn't want to prosecute anyone.

I just called the police and they hauled them away in handcuffs.Also if utilities are off I can call code enforcement and they will give occupants 24 hours to be out.

The place to start is with your local municipality...call code enforcement in your city and see if they have an issue with it. 

I would consider the minimum to be once a week..... preferably as often as possible.Also depends on number of pets, size, how big the yard is, how close the neighbors are, type of landscaping in yard etc, so there are going to be some variables, but I would set the standard at once a week...... but how do you enforce that frequency?

I have spent 10 years in the United States Army Reserve as a Military Police Officer and work for a local law enforcement agency on the civilian side.

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.

The states are cracking down on this issue big time (just check out the new legislation in Ohio and Illinois - Illinois being the most aggressive new legislation to stop wholesaling the way it is currently being taught and done - there are more states working on similar legislation).