They dropped that requirement.
ART. 1 - DÉFINITIONS
1.1 - "LE MANS" PROTOTYPE ("LM"P / "LM"GTP) is a racing car with no production minimum required and meeting the prescriptions regarding :
a/ The safety regulations issued by FIA ;
b/ The Technical Regulations issued by the AUTOMOBILE-CLUB DE L'OUEST (ACO).
1.1.1. - "LE MANS" PROTOTYPE category includes :
a/ "LE MANS" PROTOTYPE 1 ("LM"P1): open or closed (*) car, destined more especially to manufacturers.
b/ "LE MANS" PROTOTYPE 2 ("LM"P2): open or closed (*) car, destined only to privateers. The selling price of the complete new car without the engine as described in article 5.6.1. below, but with all available options must not exceed €345 000.