For my swearing in to the reserves I was told it was semi-formal, however, I figured not everyone would dress semi-formal so I just wore nice leather pants, blouse, and dress shoes. Anyways, the three others wore street clothes (ie: baseball caps, sandles, jeans, t-shirts etc.) Luckily I didn't wear a gown...LOL. Anyways, we just went over some papers and signed them. Then went into an office, I put my hand on the bible and took the oath. When finished, I signed another piece of paper and that was it....whole thing took about an hour. I thought it was going to be a big event...semi-formal attire, families, photos, etc...but not at all. One of the guys had their mom wait in the car and my mom waited in the hall until the swearing in, when she just went in the room for about two mins and watched...anyways, reg force may differ...but reserves was very laid back...