Probably the first rules you remember had something to do with home: Make your bed. Eat all your food. Don’t hit Jimmy. Obey Mom.
As you moved into the world, you learned new rules, primarily around school and community: Finish your work. Don’t talk back to the teacher. Take turns on the playground.
Eventually rules dealt with work, driving, and keeping the city safe.
There were also unstated rules, things we understood that we had to obey even though no one articulated the reasons why. For example, no jaywalking, changing clothes frequently, looking neat out in public.
Your task is to write a story in which rules and regulations play a part. Rules will depend upon the ages of your characters and how you see them interacting with others. Your story can be realistic or fantasy, humorous or serious.
Have fun with this one.