Modifies the liability of employers

SB 956 modifies Missouri's workers' compensation law (RSMo §287.120, §287.240, §537.610) to clarify employer liability and adjust benefit amounts based on specific circumstances. It directly affects most Missouri employees and employers covered by workers' comp, requiring employers to pay for work-related injuries but allowing benefits to increase (25-50%) if employers violate safety standards or decrease/forfeit (up to 50% or fully) if employees fail to use safety equipment, use alcohol/drugs at work (with strict testing rules), or participate in recreational activities without employer authorization. The bill also limits mental health claims to "extraordinary and unusual" work stress and specifies that disciplinary actions don't qualify as compensable stress. These changes define concrete policy adjustments to benefit calculations without advocating for or against the law.