THIS IS A STRATEGY SORRY, NOT MANAGEMENT POLICY ALREADY EXISTING
What you can do is add a Strategy policy that you've created. After that, you need to be able to show how practical it is, and how sustainable it is to the local resource.
It can be as ridiculous as mine is - Waterfront City (Harbour Town) - the place where it has that wheely thing. A management policy could be having a helicopter patrol the area at night. Then you say it's not sustainable and justify it by saying that the costs of having such a policy is relatively high, and alternatives such as simply more security cameras or a curfew in that area would be more sustainable and practical, as it does not take too much money and helicopters are noisy and will disturb local residents.
A more practical one, would perhaps be putting more posters around for ads on what's being sold