This treaty, designed to ensure an "unbroken curtain of water" is flowing over the falls, states that during daylight time during the tourist season (1 April to 31 October) there must be  of water flowing over the falls, and during the night and off-tourist season there must be  of water flowing over the falls.
The treaty ensures a "continuous flow of water" by requiring that during daylight hours from April 1 to October 31 (tourist season), there must be a specific volume of water over the falls, and during nighttime and non-tourist periods, there should be another specified amount.