Policies require crews needing corrective lenses to carry a spare set, seat belts and harnesses to be fastened at stations with shoulder harnesses for takeoff and landing, one pilot to keep unobstructed control access and oxygen readiness when the other leaves or transfers control, crews to leave stations only for duties or physiological needs, no seat change below 10,000 feet for duty transfer, and published guidance on preventing runway excursions (recommended) and runway incursions (FLT 3.12.1 to 3.12.7).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.