(a) The Jury Commission for the City shall maintain a jury wheel or jury box, into which the Commission shall place the names or identifying numbers of prospective jurors taken from the master list.
(b) The jury wheel or jury box shall include at least 200 names. From time to time a larger or additional number may be determined by the Jury Commission or ordered by the Municipal Judge to be placed in the jury wheel or jury box. In October of each even-numbered year the jury wheel or jury box shall be emptied and refilled as prescribed in this article: Provided, that the Jury Commission shall take measures to ensure that a sufficient number of jurors has been drawn from the earlier jury wheel or jury box before it is emptied to provide jurors for all jury panels until the jury wheel or jury box is refilled and additional jurors may be drawn therefrom; and those jurors drawn from the former wheel or box shall remain eligible as jurors until the last day of December of that year, and if drawn for a particular jury which has not finished hearing or deciding the matter before it by the last day of December of that year, such person shall remain eligible as a juror for that particular unfinished case until such case is finished or the juror is otherwise discharged as provided by law.
(c) The names or identifying numbers of prospective jurors to be placed in the jury wheel or jury box shall be selected by the Jury Commission at random from the master list in the following manner; the total number of names on the master list shall be divided by the number of names to be placed in the jury wheel or jury box and the whole number next greater than the quotient shall be the "key number", except that the key number shall never be less than two. A "starting number" for making the selection shall then be determined by a random method from the numbers from one to the key number, both inclusive. The required number of names shall then be selected from the master list by taking in order the first name on the master list corresponding to the starting number and then successively the names appearing in the master list at intervals equal to the key number, recommencing if necessary at the start of the list until the required number of names has been selected. Upon recommencing at the start of the list, or if additional names are subsequently to be selected for the master jury wheel or jury box, names previously selected from the master list shall be disregarded in selecting the additional names. The Jury Commission is not required to, but may, use an electronic or mechanical system or device in carrying out its duties.
(d) Prior to implementing the procedure described in subsection (c), the Commission shall strike from the master list names of all those persons who have served as jurors in the preceding two years.