International Standards  and all revisions will be published on the WAD A website and shall become effective on the date specified in the International Standard  or revision.”  The main purpose of the ISL is to ensure that Laboratories  and ABP Laboratories  report valid test results based on reliable evidentiary data, and to faci litate harmonization in Analytical Testing  of Samples  by Laboratories  and in the analysis of ABP blood Samples  by Laboratories  and ABP Laboratories .