The Line A and Line C Program determines whether an entered coordinate is SOUTH of Line A or WEST of Line C. Line A is an imaginary line within the US, approximately paralleling the US-Canadian border. To the north of Line A, FCC coordination with Canadian authorities is generally required in the assignment of frequencies.
Line C is an imaginary line in Alaska approximately paralleling the Alaskan-Canadian border. To the east of Line C, FCC coordination with Canadian authorities is generally required in the assignment of frequencies.
: To see the exact coordinates of Line A and Line C, see Section 90.7
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