The department administers examinations to determine an applicant's knowledge of the traffic laws of Texas and such applicant must meet a predetermined score of 70% correct, or better, on each test to qualify for a driver license. Although the applicant must understand highway signs in the English language and must have a knowledge of the traffic laws of the state, literacy itself is not a condition which must be met before a Texas driver license can be issued. Understanding is not considered to be synonymous with speaking the language. Written and oral examinations will be offered in English and Spanish only. Oral tests will be administered when actually needed.