Final answer:
Yes, it is legal to file IFR through a Restricted Area or MOA with proper authorization and coordination with the controlling agency, depending on whether these areas are active or inactive at the time.
Step-by-step explanation:
It is legal to file IFR (Instrument Flight Rules) through a Restricted Area or a MOA (Military Operations Area), but there are specific conditions that must be met. Permission must be obtained from the controlling agency, and sometimes access may be contingent on whether the areas are "hot" (active) or "cold" (inactive). For a Restricted Area, one must get clearance from the controlling agency, as these areas are established to prohibit or restrict flight activities that could be hazardous or interfere with operations. For MOAs, IFR traffic may be allowed to transit through without coordination if the MOA is cold or with ATC (Air Traffic Control) coordination if it is hot. Ultimately, whether you can file IFR through these areas also depends on real-time circumstances, such as training exercises or other military needs.