April 26th was the cut off date as far as Factory Installed Marchal lights. All GT/CS cars built after that date had Lucas installed at the Factory. As far as the sale date, IMHO, the lights should have been changed by the dealer before sale in compliance with the recall. Since a judge would only look at the production date stamped on the Door Warranty Plate, if the date stamped was before April 26th, Marchal lights would acceptable. In my opinion, if you like the Marchal lights, and it falls under the cut off date, put Marchal lights on. Not all cars took part in the recall.