using Texas as an example
Chris said:
I am curious to how you get a CCW through another state.
Q: I spend a lot of time in Texas, but don't live here year round. Can I
get a license?
A: People who live in states that do not issue concealed handgun
licenses may apply for Texas licenses. Additional fees may be
charged to out-of-state applicants to cover the cost of conducting
background checks in other states. If you live in a state that issues
concealed handgun licenses, check for a reciprocity agreement or
proclamation issued by Texas recognizing the license issued in your
state. Also, if you have a permanent residence in Texas and a Texas
56 TEXAS CONCEALED HANDGUN LAWS
driver license or identification card, you may apply for a license even if
you do not live here for the entire year.
Q: If I move to another state, do I have to turn in my license to DPS?
A: Maybe. If you plan to keep your Texas residency (your driver
license, permanent address, voter registration, etc.), you may keep
your license. Students frequently attend universities in other states but
maintain their Texas residency. If you do move out of state and get a
new driver license there, or intend to make it your residence, the move
probably will be viewed as permanent and you may be expected to
turn in your license.
Q: Can others find out if I am licensed to carry a concealed handgun?
A: Yes. Information may be provided about specific, named individuals
as a part of the public record.
Q: How long will my license be valid?
A: Permits are issued for four year terms.
Q: If I am only 20 years old, can I take the proficiency class and still get
a license when I turn 21?
A: It is best not to take the course more than six months before your
21st birthday so that your proficiency certificate is current. Your application
may not be turned in to the DPS until your 21st birthday.
Q: Can an affidavit from my application packet be notarized in a county
other than the one where I live?
A: Yes. DPS will accept affidavits as long as they are notarized in
Texas. Applicants who qualify for non-resident licenses may have their
packets notarized in their state of residence.
from their FAQ link here
http://www.txdps.state.tx.us/administration/crime_records/chl/reciprocity.htm