When hired to work for the Census Bureau, employees must sign a Sworn Affidavit of Nondisclosure.
This obligates those hired to accept the responsibility of keeping all Title 13 data confidential. This constitutes a lifetime obligation, continuing even if you are no longer affiliated with the Census Bureau.
"I will not disclose any information contained in the schedules, lists, or statements obtained for or prepared by the Census Bureau to any person or persons either during or after employment."
Under federal law, the penalty for unlawful disclosure is a fine of not more than $250,000 or imprisonment for not more than 5 years, or both.