The revision to the ISTI that came into force on March 1st, 2020 is specifically related to the requirement for urine samples to meet a suitable specific gravity for analysis:
"Dear Colleagues,
The World Anti-Doping Agency (WADA) reminds stakeholders that the revised International Standard for Testing and Investigations (ISTI) entered into force yesterday, 1 March 2020. The revised version, which was approved by WADA’s Executive Committee (ExCo) on 4 November 2019 and was first published on 3 December 2019, is an exceptional revision to the ISTI. It is in advance of other approved revisions that will come into force on 1 January 2021 along with the 2021 World Anti-Doping Code and other International Standards that were approved by WADA’s Foundation Board and ExCo in November 2019.
The revision to the ISTI that came into force on 1 March 2020 is specifically related to the requirement for urine samples to meet a suitable specific gravity for analysis. Now, the
minimum volume of urine required for analysis will remain at 90ml; however, if an athlete can provide 150ml of urine or more, the minimum specific gravity measurement (using a refractometer) will be lowered to 1.003 or above instead of the previous 1.005 or above.
If the athlete provides a sample with a volume greater than 90ml but less than 150ml, the specific gravity measurement of 1.005 (using a refractometer) will remain applicable.
Athletes who provide a sample with a specific gravity measurement lower than the above measurements will be required to continue to provide additional samples until they reach a suitable specific gravity measurement."
To read the Full ISTI update document, please click on the link on the right.