Non-US citizens can drive up to one-year on their foreign country license as long as that country is a part of the Geneva Compact. To find out if your home country is part of the Geneva Compact, please check: http://transportation.ky.gov/Driver-Licensing/Documents/Geneva_Compact_Countries.pdf
The one-year date comes from the entry date stamped on their immigration document such as the I-94.
If from a country that is not recognized by the Geneva Compact the non-US citizen cannot drive on their foreign license.
Applications for a Kentucky drivers license can be made at the address below:
The Department of Motor Vehicles (DMV)
1591 Winchester Road, Suite 104
Phone: (859) 246-2151
The following information is required at the time of application:
Visa, Passport, I-94
Letter from J-1 Scholar Advisor, Marc Invergo
Proof of Address within the last 60 days
Social Security card, Tax ID number or an Ineligibility letter from the Social Security Administration
Bring approximately $20 for fees associated with applying for the license
KRS 186.412 requires all non U.S. citizens wishing to apply for a Kentucky driver's license or ID card to make application to a Division of Driver Licensing Regional Office. For more information about the rules for obtaining a Kentucky Driver’s License, please go to: http://transportation.ky.gov/driver-licensing/pages/non-us-citizens.aspx