Definitely federal.
For the most part you will never have to worry about it because federal agents aren’t cruising around looking to bust Joe the duck hunter. But, should you manage to get onto the federal agent’s radar you WILL be in trouble because there’s so many laws, mostly relating to the handling of birds that have been reduced to the bag, that simply aren’t common knowledge.
Here’s a pic after a nice hunt where my son and I both killed limits....
....great hunt, even got check by local DNR and all was well, but that picture is enough to get a couple of tickets written by a federal agent.