I am training in the maryland area. I was cleared for an ILS approach to
runway 27 at HGR the other day.

Here is a plate:
http://204.108.4.16/d-tpp/0406/05114I27.PDF

I was about 17 miles out at 5000 feet when I got cleared for the approach.
My question is, when can I descend to 4000 feet?

Anyone?