Man was first told that he would have to give up some of his Constitutional Rights in order to foster his grandchild (WTF? This from social workers and from a JUDGE!)
He was then told he would have to register his weapons.
Michigan law does require "safe storage" of firearms in safes separate from ammunition...
http://www.foxnews.com/politics/2017/07/19/lawsuit-alleges-michigan-agency-told-grandfather-hed-have-to-give-up-gun-rights-to-foster-his-grandson.html