Housing units are counted from Census address files at the block level
What the document says“(A) use the Current Address Count Listing Files and other data products, as needed, of the Bureau of the Census tabulated from the Master Address File; and (B) make calculations at the block level, using boundaries that reflect the most current boundaries.”
The section requires the Secretary to count housing units using the Current Address Count Listing Files and other Census Bureau data drawn from the Master Address File, calculated at the block level with the most current boundaries. The Bureau of the Census and the United States Postal Service must supply relevant data on request, and the Secretary may shift the calculation periods by up to two months to line up with Census data.
What the document actually says“(A) use the Current Address Count Listing Files and other data products, as needed, of the Bureau of the Census tabulated from the Master Address File; and (B) make calculations at the block level, using boundaries that reflect the most current boundaries.”
The count comes from address lists kept by the Census Bureau. The work is done block by block. The block lines used must be the newest ones.
A block is the smallest area the Census counts. Counting there is more exact than counting by town. The post office must hand over data if asked.
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