California Code, Penal Code - PEN § 900

(a) Write down the names on the list onto separate pieces of paper of the same size and appearance, fold each piece so as to conceal the name, and deposit the pieces in a box to be called the “grand jury box.”

(b) Assign a number to each name on the list and place, in a box to be called the “grand jury box,” markers of the same size, shape, and color, each containing a number which corresponds with a number on the list.