Export policy assigned to / junction path

I want to make sure I am setting up my junction path correctly.    I have two volumes under my SVM.  Both clients / servers have the same exact permissions so therefore I create a single export policy which includes both server IPs.     On the junction path I applied this export policy to both the the volumes I created.    My question is I believe I should change Path "/" export policy  from the default to the same one that is applied to the two volumes?    Is this correct or should the path "/" export policy be left at default?   Thank you.