You should Take note: COS is sent solely online. The COS certification exam is also offered on-line, and learners have a person week in the completion of the study course to take the exam. Main occupancy requirements, like eligibility and tenant range; 504/Honest Housing; property and profits determination and calculation; https://rollbol.com/blogs/1950084/Section-8-Program-Training-Benefits-for-Landlords-and-Tenants