My husband just transferred and has to report by p...

My husband just transferred and has to report by phone on tomorrow when we get to San Antonio. We were headed to Texas but our car started acting up so it's in the shop and hopefully can be fixed in the morning so we can get on the road. He is going to call in the morning to report but we will not be in Texas until early sat morning because it's an 16 hour drive. Does anyone know if he will get into trouble?