Pursuant to Section 24 CFR §5.609(c)(9), owners and management agents of housing occupied by tenants who receive Section 8 benefits are to exclude from the calculation of annual income any temporary income payments received by those tenants from the U.S. Census Bureau. Temporary is defined as employment lasting no longer than 180 days and not culminating in permanent employment. Employer verification of both the employment dates and income amount must be maintained in the tenant’s file.

 http://www.hud.gov/offices/adm/hudclips/notices/hsg/