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4038
A coded transponder equipped with altitude reporting capability is required in all controlled airspace
| | A) below 10,000 feet MSL, excluding at and below 2,500 feet AGL. |
| | B) at and above 2,500 feet above the surface. |
| * | C) at and above 10,000 feet MSL, excluding at and below 2,500 feet AGL. |
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