15 C.F.R. § 70.3 Effect of boundary changes occurring or reported after the cutoff dates.
Title 15 - Commerce and Foreign Trade
The Bureau of the Census will not recognize changes in boundaries that become effective after January 1, 2000 in taking the 2000 Decennial Census; the Bureau of the Census will enumerate the residents of any area that are transferred to another jurisdiction after that date and report them for the Census 2000 as residents of the area in which they resided on January 1, 2000. The Bureau of the Census will not recognize in the data tabulations prepared for the 2000 census changes occurring on or before January 1, 2000, but not submitted officially to the Bureau of the Census until after March 1, 2000 except as necessary to conduct decennial census operations.
Title 15: Commerce and Foreign Trade
PART 70—CUTOFF DATES FOR RECOGNITION OF BOUNDARY CHANGES FOR THE CENSUS 2000
§ 70.3 Effect of boundary changes occurring or reported after the cutoff dates.

