A grievance is a complaint raised by an employee which may be resolved by procedures provided for in a collective agreement, an employment contract, or by other mechanisms established by an employer. Such a grievance may arise from a violation of a collective bargaining agreement, the terms of a contract, the treatment by others in the workplace, or violations of the law, such as workplace safety regulations. Under UK employment law all employees have a legal right to raise a grievance, and there is a statutory Acas Code of Practice for handling grievances.