US lawOregonRegulationsChapter 852 — Board of OptometryDivision 70 — CONTINUING OPTOMETRIC EDUCATION852-070-0005OAR 852-070-0005OAR 852-070-0005. DefinitionsLast amended: 2013Length: 27 wordsOfficial source “Hour” means clock hour of 60 minutes of instruction time, plus or minus 10 minutes. “Half-hour” means 30 minutes of instruction time, plus or minus five minutes.NextOAR 852-070-0010