Under what specific operational conditions may Reduced Runway Separation Minima (RRSM) be applied by day between two single-engine propeller aircraft on the same runway in VMC?

1. At night during calm wind conditions with radar guidance
2. Only when both aircraft are heavy wide-body transport category aircraft
3. When visibility is at least 5 km, ceiling is at least 1,000 ft, and the preceding landing aircraft is in motion and has passed a point at least 600 m down the runway from the threshold
4. Whenever the following aircraft pilot states they have the preceding aircraft in sight, regardless of runway length or distance