This excerpt taken from the PBR 6-K filed Mar 31, 2009.
4.11 Employee benefits
The actuarial commitments with pension and retirement plans and the actuarial commitment related to the healthcare plan are provisioned for in accordance with the procedures established in CVM Resolution 371/00, based on an actuarial calculation prepared annually by an independent actuary, in accordance with the projected credit unit method, net of the guarantor assets of the plan, when applicable, and the costs referring to the increase in the present amount of the liability, resulting from the service provided by the employee, recognized during the employees' period of working.
The projected credit unit method considers each period of service as a triggering event for an additional unit of benefit, which is accumulated for the computation of the final liability. Additionally, other actuarial assumptions are used, such as estimates of the evolution of costs with healthcare benefits, biological and economic hypotheses and, also, past data of expenses incurred and contributions from employees.
This excerpt taken from the PBR 6-K filed Mar 4, 2008.
3.11 Employee benefits
The actuarial commitments with respect to the pension and retirement plan benefits, and those related to the healthcare plan are provided in the Companys balance sheet, according to CVM Resolution 371/00, based on calculations prepared by independent actuaries. Their calculations are based on the projected unit of credit method, net of the assets guaranteeing the plan, when applicable, with the obligation increasing from year to year, in a manner that is proportional to the length of service of the employees during their working period.
This excerpt taken from the PBR 6-K filed Mar 18, 2005.
(e) Employee benefits
The provision for actuarial liabilities related to pension and retirement benefit plans and to health care benefits is recorded in accordance with the procedures stipulated in CVM Resolution No. 371/00, based on an actuarial calculation prepared by an independent actuary according to the projected credit unit method, net of plan assets, when applicable. The cost corresponding to the increase in the present value of the liability resulting from the services provided by the employees is recognized during the working life of the employees.
The projected credit unit method considers each service period as a triggering event of an additional benefit unit and the units are accumulated to calculate the final liability. In addition, other actuarial assumptions are used, such as an estimate of the evolution of health care costs, biometric and economic hypotheses and also historical data on expenses incurred and employee contributions.