A jury convicted Keith Bowles of murder and sentenced him to 15 years to life imprisonment. Although Bowles had 30 days to file a notice of appeal, he failed to do so. Bowles then moved to reopen the period during which he could file his notice of appeal pursuant to a federal statute, which allows district courts to extend the filing period for 14 days from the day the district court grants the order to reopen. The court granted Bowles’s motion, but rather than extending the time period by 14 days, the court inexplicably gave Bowles 17 days to file his notice of appeal. 

Bowles filed his notice within the 17 days allowed by the court’s order, but after the 14-day period allowed by statute. Ultimately, his motion for an appeal was denied because it was not within the 14-day period. The court explained that, despite the harshness of this result, it had no authority to make an exception to the prescribed 14-day time period. What school of legal jurisprudence does this court appear to be following? Explain.