The phrase "discretionary decisions" refers to choices or judgments that we are allowed to make based on our own personal judgment, rather than following strict rules or instructions. Full definition
This principle allows policy makers to make discretionary decisions in situations where there is evidence of potential harm in the absence of complete scientific proof. (frogheart.ca)
Moreover, a number of macro-prudential instruments under consideration would have some measure of automatic stabilisation built in, reducing the need for discretionary decision - making. (rba.gov.au)
This principle allows policy makers to make discretionary decisions in situations where there is the possibility of harm from taking a particular course or making a certain decision when extensive scientific knowledge on the matter is lacking. (drtimball.com)