REH (Registered Executive Housekeeper) is the highest educational designation offered by the International Executive Housekeepers Association, Inc. (IEHA) attained by completing a collegiate degree program with required courses designated by IEHA. Registered Executive Housekeepers in good standing may use the letters, REH, following their names. Requirements include a bachelor of arts or sciences degree from an accredited college or university, and required courses in the collegiate program. REH status is renewed every three years by examination.