Final answer:
The guidelines for appropriate attire for Ritual in Alpha Omicron Pi are indeed part of the AOII Governing Documents, specifically mentioned in the Book of Policies.
Step-by-step explanation:
The statement that the guidelines for appropriate attire for Ritual are found in the AOII Governing Documents, Book of Policies, is true. As a Greek organization, Alpha Omicron Pi (AOII) maintains specific guidelines and standards for its members, which includes attire for various events and ceremonies. These guidelines help maintain the professionalism and unity among members during official functions. The Book of Policies is an integral part of the AOII Governing Documents, ensuring that all members adhere to the set standards of conduct.