Tire Rack has a page on Tire Manufacturer's Puncture Repair Recommendations on patches and it's effect on speed ratings.
TIRE TECH: FLAT TIRE REPAIRS' EFFECT ON SPEED RATING
After having a flat and the tire store said was unrepairable due to the puncture being outside of the crown. I did a little research. Tire sellers appear to be looking for profits and to reduce liabilities. Tire patch/repair manufactures have a completely different view on tire repairs outside of the crown area.
31 Inc. Xtra Seal Catalog page 125.
Western Weld Catalog page 7.
These are just two tire repair manufactures that endorse repairs outside of the crown area.
Each person needs to make there own decision on tire repairs.