I understand with the TEC system you don't have to file an IFR flight plan, you can just call up and get a clearance. Is this only supposed to be for the airport pairs listed in the chart supplement or can you pretty much operate IFR without pre-filing throughout the whole SoCal area? Because it seems like people don't file flight plans for things like departing IFR to VFR-on-top, flying to a local fix for practice approaches, or hopping between airports within the same TEC "area". They just call up clearance or ground and put in a request. Is this just a SoCal TEC-related thing or would you also not file for these sort of short range operations in the rest of the country?
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