15 CFR § 90.7 - Where to file a request for a challenge.

---
identifier: "/us/cfr/t15/s90.7"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "15 CFR § 90.7 - Where to file a request for a challenge."
title_number: 15
title_name: "Commerce and Foreign Trade"
section_number: "90.7"
section_name: "Where to file a request for a challenge."
chapter_name: "BUREAU OF THE CENSUS, DEPARTMENT OF COMMERCE"
part_number: "90"
part_name: "PROCEDURE FOR CHALLENGING POPULATION ESTIMATES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "13 U.S.C. 4 and 181."
regulatory_source: "88 FR 17705, Mar. 24, 2023, unless otherwise noted."
cfr_part: "90"
---


# 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 *[email protected]* 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.