Around this stage of your kiddo will start understanding the intricacies behind why you expect her to follow some rules and regulations.
What you need to know:
Rules are important, it is necessary to teach your kid and make sure she follows them. She needs to understand that obedience is also a critical aspect of growing up. It is hence rudimentary to have a conversation with your child about rules. With constant guidance and as part of growing up, she will now begin to understand that sometimes unquestioning obedience becomes so critical that it saves her from dangerous or even fatal situations.
As your child grows up, she will get to trust you more and with a little help from you, she will understand why you are strict regarding following rules and not following those rules may have some natural consequences. Also, by way of positive reinforcement you can let her know that following rules lead to good results. In order to initiate your child into understanding the relevance of rules, you not only have to communicate it to her but also listen to her feelings and set a good example in front of her.