If you were outside the TAA on an unpublished route
, you would be given an altitude to maintain until inside the TAA.
* The issuance of the approach clearance when the flight was 44 miles from the airport on an unpublished route without clearly defined minimum altitudes.
Another change is this verbiage from the AIM: "When operating on an unpublished route or while being radar vectored, the pilot, when an approach clearance is received, shall, in addition to complying with the minimum altitudes for IFR operations, maintain the last assigned altitude unless a different altitude is assigned by ATC, or until the aircraft is established on a segment of a published route or IAP."--J.B.
"When operating on an unpublished route
or while being radar vectored, the pilot, when an approach clearance is received, shall, in addition to complying with [section]91.177, maintain the last altitude assigned to that pilot until the aircraft is established on a segment of a published route or instrument approach procedure unless a different altitude is assigned by ATC."
When issuing cruise in conjunction with an airport clearance limit and an unpublished route
will be used, issue an appropriate crossing altitude to ensure terrain clearance until the aircraft reaches a fix, point, or route where the altitude information is available to the pilot.
The section the Whidbey NAS controller referenced from 7110.65R states criteria for issuing approach clearances for aircraft operating on unpublished routes
. This includes if they are "(3) Established on a heading or course that will intercept the initial segment at the initial approach fix, or intermediate segment at the intermediate fix when no initial approach fix is published, for a GPS or RNAV instrument approach procedure at an angle not greater than 90 degrees.