The district may invest any surplus money in its treasury, including money in any sinking fund, in any of the following:

Such investment may be made by direct purchase of any issue of such bonds, treasury notes, or obligations, or part thereof, at the original sale or by the subsequent purchase of the bonds, treasury notes, or obligations.

Any bonds, treasury notes, or obligations purchased and held as investments by the district may, from time to time, be sold and the proceeds reinvested in bonds, treasury notes, or obligations as provided in this article.

Sales of any bonds, treasury notes, or obligations purchased and held by the district shall, from time to time, be made in season so that the proceeds may be applied to the purposes for which the money with which the bonds, treasury notes, or obligations were originally purchased was placed in the treasury of the district.

With the consent of the board, the general manager may:

The

bank or trust company selected shall have a total paid-in capital of at least one million dollars ($1,000,000). The general manager shall take from the trust department or trust company a receipt for the securities, and neither the general manager nor the district is responsible for the custody and safe return of the securities until they are withdrawn from the trust department or trust company by the general manager. Any trust department or trust company to which securities are delivered, either as agent or depository for the district, shall make such disposition of the securities as the general manager directs and is responsible only for the strict compliance with written instructions given to it by the general manager. All such securities are at all times subject to the order of the general manager.