Motion of the Acting Solicitor General for leave to participate in oral argument as amicus curiae and for divided argument granted. The joint motion of petitioners for enlargement of time for oral argument and for divided argument is granted and the time is divided as follows: 15 minutes for petitioner in No. 18-18, 10 minutes for petitioners in No. 17-1717, 10 minutes for the Acting Solicitor General as amicus curiae, and 35 minutes for respondents.