ABP Operating Guidelines  – Version 9.0 – July 2023  Page 44/91 5.0 Analytical Testing Procedure Requirements  5.1 Analytical  Testing Procedure  Validation Requirements  Prior to the implementation of the Analytical Testing Procedure  for the quantification of blood endogenous steroids in routine Doping Control  analysis, the Laboratory  shall fulfil the following requisites:  − Validate the Analytical Testing Procedure , including the determination of the assays’ Limit of Quantification  (LOQ ), Repeatability  (sr), Intermediate Precision (sw), Bias and Measurement Uncertainty  (uc); − The Analytical Testing  Procedure  shall meet the acceptance values for the parameters of assay performance applicable to the separate determination of T and A4 concentrations as specified in Table 1 below.