15 C.F.R. § 90.6 Where to file challenge.
Title 15 - Commerce and Foreign Trade
A challenge must be prepared in writing by the unit of government and is to be filed with the Chief, Population Division, Bureau of the Census, Room 2011, Federal Building 3, Washington, D.C. 20233.
Title 15: Commerce and Foreign Trade
PART 90—PROCEDURE FOR CHALLENGING CERTAIN POPULATION AND INCOME ESTIMATES
§ 90.6 Where to file challenge.