If he wasn't operating a vehicle why would this need to be reported? Unless it involved a suspension of his license. I don't interpret the question in a way were this would need to be reported.

History of (1) any conviction(s) involving driving while intoxicated by, while impaired by, or while under the influence of alcohol or a drug: or (2) history of any conviction(s) or administrative action(s) involving an offense(s) which resulted in the denial, suspension, cancellation, or revocation of driving privileges or which resulted in attendance at an educational or a rehabilitation program.