ILS Range of use

[blablabla]

Hello fellow aviators I know this was talked about before but I cant find the thread and I have searched the net trying to find a written document detailing the rules of use for ILS range for LOC and GP but cant find anything. I seem to recall something about the LOC being reliable from 22miles and the GP 12miles but can anyone tell me the actual recommended range of use for both as often I have heard of some Aicraft beng cleared to incercept the LOC from 25-30 miles out from the RWY. ANd is anyone able to provide me with a link to some written info please.

[cougar77]

Link from FAA FAR/AIM

http://www.faa.gov/airports_airtraffic/air_traffic/publications/ATpubs/AIM/Chap1/aim0101.html

[Capt. Inop]

Have a look here: http://www.pprune.org/forums/showthread.php?t=279058

[blablabla]

Hey thanks both thats really usefull thanks for the reply