– You can wear short clothes in the Khmer Ancient temple sites but,if you visit Buddhist monastery or pagoda, it is not permitted. You must wear along one and take a shoe or hat off before climbing up. This is a rule, 90 percent of 15 million population are Buddhist religion.
Special notices : If you visit Angkor Wat temple, you must wear a long pants.  If you wear a sexy or short clothes, Cambodian Authorities will not permit you to climb up to the third level of Angkor Wat temple. The third level of Angkor Wat temple was closed two years ago for restoration and safety of tourists. It had just re-opened on 15 January 2010.