The department may refuse to issue or renew a driver's license to any person:
If, however, the driving privilege of the applicant is on probation for a cause related to the use or possession of a narcotic controlled substance, the department may refuse to issue or renew a driver's license to the applicant if the applicant is subsequently convicted of any offense involving the use or possession of a narcotic controlled substance, whether or not the commission of the offense involved the use or operation of a motor vehicle.
The maximum period of time for which the department may refuse to issue or renew a driver's license to any person pursuant to this subdivision shall be three years from the date of conviction.
Ca. Veh. Code § 12809