True or False:

The constitution requires that a national census be taken every four years

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Have you done any research on this?

I did research on the question and can't find the answer and I didn't read any site rules

Maybe this will help...
National Policy Analysis #210: The 2000 Census: Sampling or a Straight Count? - September 1998

Thank You that did help

Your welcome!

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Gee didn't take me long to find this:

US CODE--TITLE 13--CENSUS
And this:
About the US Census Bureau

On the census bureau site.