Individual state hunting laws determine who is required to take a hunting certification. The application of being "grandfathered" varies significantly across different states and jurisdictions. Some states may have specific cut off dates.
New hunters, regardless of age, are usually required to complete a mandated hunter education course. This ensures that all hunters are equipped with up-to-date knowledge on safety, legal, and ethical aspects of hunting.
It is essential to consult your local wildlife and hunting regulatory bodies for the most up to date accurate information.
You can find out more information by selecting your state on ilearntohunt.com and scrolling down to the "Laws and Regulations" section.
Please refer to the image below as an example: