15 CFR 90.6 - When a challenge may be filed.
(a) A request for a challenge to a population estimate may be filed any time up to 90 days after the release of the estimate by the Census Bureau. Publication by the Census Bureau on its Web site (www.census.gov) shall constitute release. Documentation requesting a challenge of any estimate may also be filed any time up to 90 days after the date the Census Bureau, on its own initiative, revises that estimate.
Title 15 published on 2015-12-05.
No entries appear in the Federal Register after this date, for 15 CFR Part 90.