Pub. Util. Code, § 817

A public utility may issue stocks and stock certificates or other evidence of interest or ownership, and bonds, notes, and other evidences of indebtedness payable at periods of more than 12 months after the date thereof, for any one or more of the following purposes and no others:

(a) For the acquisition of property.

(b) For the construction, completion, extension, or improvement of its facilities.

(c) For the improvement or maintenance of its service.

(d) For the discharge or lawful refunding of its obligations.

(e) For the financing of the acquisition and installation of electrical and plumbing appliances and agricultural equipment which are sold by other than a public utility, for use within the service area of the public utility.

(f) For the reorganization or readjustment of its indebtedness or capitalization upon a merger, consolidation, or other reorganization.

(g) For the retirement of or in exchange for one or more outstanding stocks or stock certificates or other evidence of interest or ownership of such public utility, or bonds, notes, or other evidence of indebtedness of such public utility, with or without the payment of cash.

(h) For the reimbursement of moneys actually expended from income or from any other money in the treasury of the public utility not secured by or obtained from the issue of stocks or stock certificates or other evidence of interest or ownership, or bonds, notes, or other evidences of indebtedness of the public utility, for any of the aforesaid purposes except maintenance of service and replacements, in cases where the applicant has kept its accounts and vouchers for such expenditures in such manner as to enable the commission to ascertain the amount of money so expended and the purposes for which such expenditure was made.