They can enter how many they want /can but they can nominate only 3 of them to score manufacturer points (and only the 2 best of them collect those) before each event. M-sport so far for example has nominated Evans, Tänak and Ogier a, Bertelli and Ostberg use the name ( because only manufacturer teams can register 2017 cars). Until Corsica Tänak and Ogier collected manu. points, but in Argentina Evans was second and Tänak third, so no 4th place manu. points from Ogier, Latvala collected those.