When can a mechanic renew their safety certification?

A mechanic can renew their safety certification within a specific timeframe once they are notified by the department, which is 180 days. This period allows mechanics to prepare and fulfill any necessary requirements, such as completing additional training or refresher courses, ensuring that they are up to date with current safety standards and practices.

This process is designed to maintain the quality of safety inspections and ensure that mechanics have the latest information and skills to conduct thorough inspections. Renewing the certification only when notified reinforces the importance of compliance and keeps the mechanics' training in sync with any changes in regulations or safety protocols that may occur.

Other timeframes mentioned in the options are not suitable because they either do not allow sufficient time for renewal or suggest that renewal can happen without proper notification and adherence to department guidelines.