Rule Section 73.3526(e)(4), 73.3527(e)(3)
Retention As long as they reflect current, accurate information regarding the station.
What's in here? These are graphical representations or "maps" of the area in which a broadcast station provides a particular level of signal strength over-the-air. They are useful, but general, indications of where service might be expected to be received from the station. They do not account, however, for the availability of a television station's signal carried by cable or satellite service providers, nor do they suggest that every point inside the contour will receive over-the-air service.