California Code, Government Code - GOV § 13307

(a) Encumbrances, which are any valid obligation for the delivery of goods or services, should not be counted as a budgetary expenditure until the delivery of the goods or services.

(b) The unencumbered balances of appropriations, which exist when no commitment for an expenditure is made, should be an item of disclosure, but the amount should not be deducted from the fund balance.

(c) Changes affecting a budget subsequent to publication of financial statements, such as actions to disencumber funds, should be reflected in budget documents after documentation is provided.