drauk
Approach procedures in the US are designed in accordance with FAA Order 8260.3, called TERPS available from
here but very big (28 Mb). Outside the US, the international standards aare laid down in PANS-OPS vol 2 published by ICAO.
The
ILS27L for South Bend doesn't look particularly unusual. You are expected to track outbound on the localizer. If I read TERPS correctly, the primary protected area on each side of the localizer is 6 nm. The protection extends along the length of the PT (10 nm).