(1) When deciding whether the driver of a fatigue-regulated heavy vehicle was fatigued, a court may consider the following—
(a) what is commonly understood as being fatigued;
(b) the causes of fatigue;
(c) the signs of fatigue;
(d) any relevant body of fatigue knowledge;
(e) any other matter prescribed by the national regulations.
(2) Subsection (1) does not limit the matters the court may consider when deciding whether a driver was impaired by fatigue.