491—6.25 (99D) Driver. In determining eligibility for a driver’s license, the board shall consider:
	  1. 	 Whether the applicant has obtained the required U.S.T.A. license.
	  2. 	 Evidence of driving experience and ability to drive in a race.
	  3. 	 The age of the applicant. No person under 18 years of age shall be licensed by the commission as a driver. However, a person under 18 years of age, but at least 16 years of age who has the written consent of a parent or guardian, may be licensed to drive in qualifying races only.
	  4. 	 Evidence of physical and mental ability.
	  5. 	 Results of a written examination to determine qualifications to drive and knowledge of commission rules.
	  6. 	 Record of rule violations.