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13111. Candidates for each office shall be printed on the ballot in accordance with the following rules:
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(c) In the case of all other offices, the candidates for which are to be voted on throughout the state, the Secretary of State shall arrange the names of the candidates for the office in accordance with the randomized alphabet as provided for in Section 13112 for the First Assembly District. Thereafter, for each succeeding Assembly district, the name appearing first in the last preceding Assembly district shall be placed last, the order of the other names remaining unchanged.
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13112. The Secretary of State shall conduct a drawing of the letters of the alphabet, the result of which shall be known as a randomized alphabet. The procedure shall be as follows:
(a) Each letter of the alphabet shall be written on a separate slip of paper.... The resulting random order of letters constitutes the randomized alphabet, which is to be used in the same manner as the conventional alphabet in determining the order of all candidates in all elections. For example, if two candidates with the surnames Campbell and Carlson are running for the same office, their order on the ballot will depend on the order in which the letters M and R were drawn in the randomized alphabet drawing.

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The above sections came from the California Elections Code from California Law.