Therefore, the incorrect reporting of an EQAS  sample as a Negative Finding  or as an Adverse Analytical Finding, as applicable, when the assigned value of the Threshold    ISL – January 2021 Page 129 of 160 Substance  in the EQAS  sample is close to the Decision Limit, is not considered as a False Negative Finding  or False Adverse Analytica l Finding, respectively, if the absolute z -score (truncated to one (1) decimal place ) for the Laboratory 's quantitative result is < 3.0 (see footnote 31).]