Pay attention to the colors others are wearing, and interact according to the Band-Together™ guidelines (see links under item 2 above)
Be aware that the Band-Together™ system is not as safe as the stay-at-home system we have been using. Running risks and shouldering responsibilities are the price to be paid for greater freedom. Some people who use the Band-Together™ system will get sick—you might be one of them.
It is safest for everyone to err on the side of caution
If you are unsure of how to deal with someone, ask them what they are comfortable with, and the two of you can work it out.
Live by the Golden Rule: figure out how others would like to be treated, and do your best to treat them that way (or better if you can manage it).
Use your brain. We can supply some answers for you, but not all of them
Life is not perfect; mistakes happen, so be a little understanding and lenient when things go wrong.