Frequency separation (kHz) | Contour of proposed station (classes B, C and D) (mV/m) | Contour of any other station (mV/m) |
0 | 0.005 0.025 0.500 | 0.100 (Class A). 0.500(Other classes). 0.025 (All classes). |
10 | 0.250 0.500 | 0.500(All classes). 0.250 (All classes). |
20 | 5 5 | 5 (All classes). 5 (All classes). |
30 | 25 | 25 (All classes). |
Note 1: In the case of applications for changes in the facilities of AM broadcast stations covered by this section, an application will be accepted even though overlap of field strength contours as mentioned in this section would occur with another station in an area where such overlap does not already exist, if:
Note 2: The provisions of this section concerning prohibited overlap of field strength contours will not apply where:
Note 3: In determining the number of "authorized" aural transmission facilities in a given community, applications for that community in hearing or otherwise having protected status under specified "cut-off" procedures shall be considered as existing stations. In the event that there are two or more mutually exclusive protected applications seeking authorization for the proposed community it will be assumed that only one is "authorized."
Note 4: A "transmission facility" for a community is a station licensed to the community. Such a station provides a "transmission service" for that community.
47 C.F.R. §73.37