Cal. CIV § 2362

An auctioneer, in the absence of special authorization or usage to the contrary, has authority from the seller, only as follows: 1. To sell by public auction to the highest bidder; 2. To sell for cash only, except such articles as are usually sold on credit at auction; 3. To warrant, in like manner with other agents to sell, according to Section 2323; 4. To prescribe reasonable rules and terms of sale; 5. To deliver the thing sold, upon payment of the price; 6. To collect the price; and, 7. To do whatever else is necessary, or proper and usual, in the ordinary course of business, for effecting these purposes.