---
kind: "section"
citation: "15 C.F.R. § 90.7"
title: "15"
number: "90.7"
heading: "Where to file a request for a challenge."
url: "https://uscodex.org/cfr/15/90.7"
---

# §90.7. Where to file a request for a challenge.


A request for a population estimate challenge must be prepared in writing by the governmental unit and filed with the Chief, Population Division, Census Bureau by sending the request via email to POP.challenge@census.gov or to a physical address that the Census Bureau will specify in the updated “Population Estimates Challenge Program Review Guide” to be posted in the census.gov website. The governmental unit must designate a contact person who can be reached by telephone or email during normal business hours should questions arise with regard to the submitted materials.


## Notes

### Authority

Authority: 13 U.S.C. 4 and 181.

### Source

Source: 88 FR 17705, Mar. 24, 2023, unless otherwise noted.