Briefly describe the precautions for the state dinner This is in chapter 16
If you mean "precautions" as something that is done to prevent any sort of harm from happening, there is not very much in the way of precautions to be seen in Chapter 16.
The only precaution taken to ensure the safety of the Prince is taken with his food. Each dish of food is brought in by a guard. The food is brought to the taster. The taster then gives each guard part of the food he brought in. That way, if the food is poisoned, that guard will die and the Prince will not eat any of that food.
That is the only safety precaution mentioned in this chapter.
In "The Prince and the Pauper" by Mark Twain the state dinner will take place in the official banqueting room. By the door stand two guards dressed in formal regal costumes. A band of musicians are brought in to provide entertainment. A man lays out a fine tablecloth. He goes out and two other men come in and set-up a salt-cellar, a plate, and bread. The men bear a rod when they enter and leave the hall and they also bow down out of respect. Two elegant nobles then proceed to rub the table with salt and bread and cut and taste the food. This ceremony is performed as if the king was in the room, but he is not present yet. This was found in Chapter 16 and can be accessed on line at the sight below.