Cal. Rev. & Tax. Code § 30167

A licensed distributor may apply to the board to fix the maximum amount of deferred-payment purchases of stamps and meter register settings which the distributor may have unpaid at any time. Upon receipt of the application and the bond or bonds required pursuant to Section 30142, the board shall fix such amount. The board at any time may designate the sales locations where the distributor may make deferred-payment purchases of stamps and meter register settings and fix the amount of such purchases which the distributor may have unpaid at any one time with respect to purchases made at each of the designated sales locations.