Rental agreements can vary from state to state because landlord-tenant laws vary in the same way. State laws address certain rental-related topics such as late rent fees, collecting and returning security deposits, landlord entry notice and environmental hazard disclosures, according to Nolo.com.
Findlaw.com adds that state laws also dictate whether a lease converts to a month-to-month rental after the initial lease expires.
Both Nolo.com and Findlaw.com offer overviews of individual states' landlord-tenant laws. Both sites also sell state-specific landlord-tenant forms.
Along with the federal Fair Housing Act, state laws address housing discrimination. CivilRights.org posts links to state fair housing laws.
Findlaw.com recommends consulting a landlord-tenant law attorney with questions about state laws.