Greetings of the day from India to all the members on this Forum 
Good to see quite an interesting number of queries by Mr Rahul in the recent past on the increasing CDM requirements .
Well; as explained very well by our ESDA expert Andy Sir, the walking test for qualifying a footwear flooring system is to ensure personnel grounding which is more applicable to the HBM limits of an ESDS item with the limit of peak voltage less than 100 volts .
However; subject to sensitivity of your job and the class of devices handled, for specific areas you may go with ESC flooring rather than ESD flooring to keep your walking voltage less than 25 volts and you may also try to follow as per the foot note (9) under table 3 of ANSI ESD S 20 20 2021 ( once again as suggested above by our Andy Sir)
The best way out once again as per Andy Sir, is to have the periodic process assessment per SP17.1 and adapt the required safety steps.
Now it is better to have SP-17.1 periodic process assessment along with the periodic Compliance verification test per TR 53 to ensure a fool proof EPA and such facilities are the right ones to get the S 20 20 /61340-5-1 facility certification…
Here I would like to add our ESD Guru –ESDA expert JK Sir’s words in a reply to Is ANSI/ ESD S20.20-2021 ready for AI?
As of now, ANSI/ESD S20.20 has 100 v HBM and 200 v CDM in the scope, there are more devices that require lower withstand voltages. ANSI/ESD S20.20 can still be used as it is still a framework for an ESD control program but to evaluate what the process can handle requires the tools in ANSI/ESD SP 17.1 - Process Assessment. These two documents should be used together to develop a complete ESD control program to meet the needs of the future.
Thank you