There are 2 situations:
- Either your employee does not need his driving licence as part of his job. You do not have to know the actual validity of his drivring licence
- Either your employee needs a driving licensc: you can control it on a regular basis on the actual possession of the category of driving licence that he needs.
I invite you to follow the following links for more information:
1- Employer Information
2- Layoff Framework for Loss of Permit .