Define Visual Meteorological Conditions (VMC) and Instrument Meteorological Conditions (IMC) and explain why they influence flight rules.

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Visual meteorological conditions are weather conditions that allow flight by visual references outside the cockpit, enabling visual flight rules (VFR). Instrument meteorological conditions are weather conditions that require pilots to fly primarily by reference to cockpit instruments, under instrument flight rules (IFR). These conditions influence flight rules because VMC supports VFR with required visibility and cloud clearance, while IMC requires IFR with ATC clearance and instrument navigation. The weather conditions set the applicable minima and regulations: VFR minima for day-to-day visual flight and IFR minima for instrument flight, approach procedures, and flight planning. The statement captures that VMC permits VFR using visual references, IMC demands IFR with cockpit instruments, and both define the weather minima and regulations that must be followed.