KZYX and KZYZ Contour Maps
CONTOUR MAPS -Is a copy of any service (coverage) contour maps, submitted with any application tendered for filing with the FCC, together with any other information in the application showing service contours, and /or main studio and transmitter location in the file? [See §73.3526(e)(4) or §73.3527(e)(3)]
RETENTION: Station's contour maps are retained for as long as they reflect current, accurate information.