I thought I knew the U.S. uniform vehicle code laws fairly well but this issue of an International Driver Permit wasn’t in that book of knowledge.
Follow up: The International Driver Permit (IDP) is not a driver license and if used alone does not permit a person operate a motor vehicle. It is a multilingual translation of one’s current valid driver license but it is not a license to drive.
The IDP is a little smaller than a passport and has the licensee's photograph and physical descriptors (height, weight – which is always false and misleading, eye color, hair color, D.O.B.).
If the IDP is presented to a law enforcement officer there must have a current valid driver’s license presented along with the IDP. The state issued (
or territory issued) drivers license is the license, the IDP is the permit that says the US complies with international uniformity of traffic laws, like the 1949 Treaty K-Paxian wrote about. Example of uniformity include the red colored octagon sign which means stop, red tail and brake lights, etc.
In California, in the early days of automobiles, each county made up their own rules of the road. In Los Angeles County, tail/brake lights were red; you will never guess what color they were in
Orange County.
The Southern California Automobile Club a part of American Automobile Association (AAA) was a leader in calling for uniformity nationwide, Canada-wide and worldwide. I sound like a bad advertisement for AAA.
In the United States, only AAA and the National Automobile Association’s AATA are authorized by the US Department of State to issue an international drivers permit. According to the AAA website Costa Rica was not a party to the 1949 convention.
My experience in getting a Costa Rica driver license was an exercise in waiting. Not unlike the military – hurry up and wait.
It seemed to me the only thing they really wanted was revenue. I had to take a physical which was cursory at best. If you can stand unassisted for five seconds – just long enough to give the doctor 10000 colones – you pass!
They accepted my US drivers license as proof of driving skills. I am surprised they didn’t issue my CR license with my CDL number on it.
Source:
http://www.aaa.com/vacation/idpapplc.html and a AAA legal specialist.