If an injury results in a permanent loss of function of a body part covered by the Workers` Compensation Act, this second type of agreement is used. The difference is that this voluntary agreement lists the affected body part and the number of weeks granted – for example, it could list a 5% loss of back or a 100% loss of hand or a 35% loss of heart. Ultimately, a voluntary agreement is a legal document. Therefore, it is difficult to change it after approval. Therefore, it is essential to ensure that the voluntary agreement is correct in all respects and does not result in the negligence of an employee because the voluntary agreement contains the wrong rate of pay or a lower premium amount than permitted by law. .