Class A uniform is the military uniform with a coat and tie. It is normally required when a 4-star general or equivalent is giving a presentation. It is acceptable at almost any social function. The Class B uniform is without the coat and tie, and short sleeve shirt. Class attendance will normally be in Class B uniform or civilian coat and tie.
Picnic attire can be jeans or shorts.
IFs are often invited to a lunch or dinner with distinguished guests. In these situations the office which issued the invitation will pay meals for the IFs. When in doubt, ask the IF office staff. Usually 50 cents for each bag is appropriate. Dependent IF children age 14 or older are permitted to bag groceries at the Commissary if they have an ID card.