I suggest you go
here and click on your state and read the laws particular to your state. I only skimmed it so can answer your specific question but this would be a good place to start.
Also the STICKY at the top of the Montana section where you posted says this about OC .....
Open Carry
Montana is an open carry state. That means that most anyone who can legally own a firearm can carry it unconcealed anywhere in Montana with only a few exceptions like schools and federal buildings. Montana expressly permits drawing or presenting a weapon to an aggressor threatening bodily harm. MCA 45-3-111
http://data.opi.mt.gov/bills/mca/45/3/45-3-111.htm
Localities are substantially preempted, but have limited power to prevent and suppress the carrying of concealed or unconcealed weapons to a public assembly, publicly owned building, park under its jurisdiction, or schools. MCA 45-8-351
http://data.opi.mt.gov/bills/mca/45/8/45-8-351.htm
You only need to be 14 years old to open carry in Montana. If a minor under 14 wishes to open carry they must be accompanied by an adult who is the child’s parent or guardian or who has been authorized by the child’s guardian to supervise the child. MCA 45-8-344
http://data.opi.mt.gov/bills/mca/45/8/45-8-344.htm (Federal law still applies)
Great, thank you so much for that link and the information and sources you provided. It has definitely eased my mind on the legality of this matter.
I found this on the first link you provided.
There is some misinformation on the Montana DOJ Website you link to for Montana at:
http://doj.mt.gov/enforcement/criminaljustice/concealedweapons.asp
In its first paragraph, DOJ states the case to make Montana law sound much more restrictive than it really is.
In Montana, nobody needs a permit to carry concealed outside the limits of a city or town, which is 99.4% of
Montana. Inside city limits, a permit is required to legally carry concealed, but a permit is not required in
one's home or place of business. And, Montana recognizes permits from most (40) other states.
45-8-317. Exceptions. (1) Section 45-8-316 does not apply to:
(i) a person who is outside the official boundaries of a city or town or the confines of a logging,
lumbering, mining, or railroad camp or who is lawfully engaged in hunting, fishing, trapping, camping,
hiking, backpacking, farming, ranching, or other outdoor activity in which weapons are often carried for
recreation or protection; or
(j) the carrying of arms on one's own premises or at one's home or place of business.