A full accrual basis of accounting for revenue and expenses is required for all health facilities. Revenues shall be given recognition in the period during which the service is provided. Except as may be provided in the long-term care manual prescribed by Section 97019, patient revenue shall be recorded at the full established rates regardless of the amounts actually paid to the health facility by or on behalf of the patients. Revenue deductions in all health facilities shall be given accounting recognition in the same period that the related revenues are recorded. Health facility expenses shall be given recognition in the period in which there is (1) a direct identification or association with the revenue of the period, as in the case of services rendered to patients; (2) an indirect association with revenue of the period, as in the case of salaries or rent; or (3) a measurable expiration of asset costs even though not associated with the production of revenue for the current period, as in the case of losses from fire.