I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "The customary law of Normandy was developed between the 10th and 13th centuries and survives today through the legal systems of Jersey and Guernsey in the Channel Islands. Norman customary law was transcribed in two customaries in Latin by two judges for use by them and their colleagues: These are the Très ancien coutumier (Very ancient customary), authored between 1200 and 1245; and the Grand coutumier de Normandie (Great customary of Normandy, originally Summa de legibus Normanniae in curia laïcali), authored between 1235 and 1245."? 

Which was earlier, the earliest possible date for the Tres ancien coutumier or the latest possible date for the Grand coutumier de Normandie?