as a full time i driver i have spent the past month covering a part timer who has become deathly ill. we work in a small hub and i am one of few that knows how to do his job in data que. its 4 o'clock now and seeing how our preload start time is 2:45 i was preparing to lay down soon but just revived a text via a on road supervisor that they need me on road tomorrow. does this fall under the 24 hour notice category.