"Peter" wrote in message
...

Does that mean that, on an IFR flight, one is not allowed to descend
below the MOCA except on a published IAP?

One could read 175 as saying that if an official IAP is provided, it
must be used.


No, it means that unless otherwise authorized by the Administrator
nonmilitary aircraft of the United States operating under IFR are not
allowed to descend below the minimum IFR altitude when an instrument letdown
to a civil airport is necessary except on a published IAP.