 While there are exceptions in certain rural areas, community radio stations are usually limited to broadcast areas smaller than commercial or BBC local stations, nominally within a radius of their transmitter.The normal allocated power for a new community radio station in an urban area is 25 watts vertically polarised, although most allocations permit the addition of a further 25 watts horizontally polarised.For some rural stations these limits are increased to 50 watts vertical plus 50 watts horizontal.