Your Montana driver license can stay valid until 90 days after you receive an honorable discharge. The exemption shows as a 90-day exemption notice printed on the back of your license.
Mail the Motor Vehicle Division mail-in military exempt status application to Montana Department of Justice, Motor Vehicle Division, Attn: Mail-In DL, PO Box 201430, Helena MT 59620-1430. For questions call 406-444-3933.
Your active duty orders and your current Montana driver license details.