Final answer:
Cosmetology requires a professional license issued by government agencies to ensure service quality and compliance with health and safety standards. Practicing without a license in cosmetology is generally illegal and can lead to penalties and potential harm to clients.
Step-by-step explanation:
The practice of cosmetology requires a professional to hold a license which is typically issued by government agencies. This license is a way to establish the quality of service in the labor market and ensures that a person has completed the necessary education or training and passed any required examinations. In the case of cosmetology, most states mandate licensing to ensure that health and safety standards are met, to prevent the spread of infections, and to maintain a high level of professionalism within the industry. Practicing without a license is generally illegal and can result in penalties including fines and possible criminal charges, as well as the risk of harm to clients due to lack of formal training in sanitation and proper procedures.