Adds provisions relating to a landlord failing to remedy a condition that would materially affect the health and safety of a tenant

HB 253 requires landlords in Missouri to address health- and safety-threatening conditions in rental properties within 30 days of written tenant notice. It directly affects tenants facing hazards like pest infestations (including bedbugs, rodents, and spiders), mold, sewage backups, or unsafe structural issues, and holds landlords liable for resulting health costs if they fail to act. Key provisions mandate landlords begin remediation within 30 days of notice, cover tenant health care expenses in damages, and require post-remediation inspections by licensed inspectors to verify corrections. The law applies to all residential rental properties covered under Missouri's landlord-tenant code.