The last time I brought a Form 4 to the MSP licensing division they told me I'd shown up after their office hours, but they kindly took it anyway. Now I've forgotten what their office hours are.
So, what are their office hours?
Better just to call to make sure. Last time I was up there they were in a trailer. Seems to me they have banker hours or worse.
Weekdays 10am-2pm. They are there the whole day but only accept dropped off forms during those hours.