Final answer:
Karl should check the local regulations for license renewal, as processes can differ. If the expiration is recent, he may just need to pay a late fee and submit an application, but if the expiration period is longer, he might need to meet additional requirements such as retaking exams.
Step-by-step explanation:
If Karl wants to renew his license that expired on September 30, 2030, and it's now May 11, 2031, he should check the specific regulations of the licensing authority in his area because procedures can vary from one jurisdiction to another. Typically, if a license has been expired for a short period, such as a few months, the renewal process might involve simply paying a late fee, completing a renewal application, and providing any required documentation. However, if the license has been expired for a longer period, Karl might have to retake certain exams or fulfill additional requirements. It's important that Karl renew his license as soon as possible to avoid any legal issues or penalties associated with operating with an expired license.