(1) in the case of work carried out by the Minister responsible for the Act respecting roads (chapter V-9) lasting for more than 10 consecutive days, may not exceed,
(a) if there is an infrastructure present, one half of the infrastructure’s opening if the dewatering or narrowing is carried out between 15 June and 30 September or one third of its opening if the dewatering or narrowing is carried out between 1 October and 14 June,
(b) if there is no infrastructure present, two thirds of the width of the watercourse;
(2) in other cases,
(a) may not exceed one third of the width of the watercourse,
(b) may not last for more than 30 consecutive days, and
(c) may not occur more than twice a year.