The AIM states, "Straight-in Minimums are shown on the IAP when the final approach course is within 30 degrees of the runway alignment (15 degrees for GPS IAPs) and a normal descent can be made from the IFR altitude shown on the IAP to the runway surface. When either the normal rate of descent or the runway alignment factor of 30 degrees (15 degrees for GPS IAPs) is exceeded, a straight-in minimum is not published and a circling minimum applies."
Freeway Airport (W00) has an RNAV 36 approach with a final course alignment offset by 16.76°, which seems to go against the AIM's note. This appears to be potentially due to the prohibited area west of the field. However, there is an even more extreme example with the RNAV 15 into Kingston-Ulster Airport (20N), with a 29.15° offset, with no SUA around it.
Is there a source document for allowing for such exceptions?
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