Is tds reduction rate applicable on bills before 14/05/2020

tds rate reduction is applicable from 14/05/2020 to 31/03/2020

but is rate applicable for montly bills paid for march 2020 & april 2020

Example:

1. We are paying security charges to vendor for February & march 2020 & april 2020 now / after 14.05.2020

Which tds rate is applicable??

2% OR 1.50%

2. Example:

If charges are paid for cleaning services for may 2020 - fixed amount is paid

so i have deduct tds from 01/05/2020 to 13/05/2020 2% & 14/05/2020 to 31/05/2020 tds rate 1.50%

or

tds rate 1.50% on full amount 

THANKS & REGARDS