Poverty information from 2017-2021 ACS data

Hi All,

I am working on revising a manuscript where I used poverty level data from the 2017-2021 ACS 5-year PUMS data. I used the variable POVPIP for the income-to-poverty ratio.

I have been asked by the journal to provide the agency that determined the poverty level you are referencing and the year it determined it. Does anyone know what this is or how I can locate this information? 

Best,

Tiffany