What are the requirements to be a Section 8 landlord? Are housing quality standards uniform throughout the country?

This page on HUD's website is a good place to start to learn about being a landlord. The housing quality standards for the Section 8 program are uniform across the country however, since they are interpreted and enforced by thousands of different housing authorities and inspectors, there are large discrepancies in standards from jurisdiction to jurisdiction. To view HUD's standard quality standards, go here. You should be prepared for different interpretation by different housing authorities and even different inspectors within the same housing authority.