To exempt primary schools and day-care centres from the requirements of Sentence 3.7.2.2.(6), which would otherwise use a different method for determining the minimum number of water closets, on the basis that such occupancies have different needs.
To state the method for calculating the number of water closets required in an occupancy that is used for a primary school or a day-care centre.
This is to limit the probability of an insufficient number of water closets, which could lead to the inability of persons to use water closets in a timely manner, which could lead to unsanitary conditions, which could lead to harm to persons.