California Code, Public Contract Code - PCC § 10833

(a) Except as otherwise provided in subdivision (b), each contractor who enters into a contract with a California State University campus for ten thousand dollars ($10,000) or more shall be assigned an identification number by the president of that California State University campus. Each contractor who has been assigned a number shall list it on each contract the contractor enters into with the California State University campus, regardless of the amount of the contract. In the case of a corporation or firm, the president's assigned number shall be used exclusively on each contract with that president's campus. The assigned number shall remain unchanged regardless of future name changes.

(b) If the identification numbers cannot be tracked centrally by the Trustees of the California State University, then the trustees, and not the presidents, shall assign the identification numbers.