What should an officer do if a subject displays confident balance during the One Leg Stand?

When a subject demonstrates confident balance during the One Leg Stand test, it indicates that they are able to perform the task without difficulty, which suggests that they are likely not impaired. This assessment aligns with the purpose of the field sobriety test, which is to evaluate a person's balance and coordination.

If the subject maintains proper posture and balance, it can provide reliable evidence that their motor skills are intact. Therefore, marking it as a pass in this context signifies that the test has been successfully completed, indicating no signs of impairment related to balance. Other responses would not be appropriate in this scenario: re-administering the test would be unnecessary, conducting another type of test could delay the process without justification, and assuming impairment contradicts the observation of confident performance during the test. Marking it as a pass is the most logical course of action based on the observed behavior.