Stephen:

My sources advise the City of Portland has neglected to seek the necessary Federal Highway Airspace Lease.

The posting of the regulations is intended to demonstrate this is NOT a trivial matter (especially in light of all the other "planning" failures on the tram): posting a link would not have conveyed the complexity and dilligence required to obtain the lease.

It also illustrates that designing a complex licensing mechanism (which the City's various bureaus accomplish with much aplomb) is much easier than trying to satisfy the complex licensing mechanism.

The City of Portland is now on the receiving end of burdensome and overreaching bureaucracy: a link would not illustrate that "twist in the wind" reality because it would have understated the burdensomem and overreaching nature of the Airspace Lease. After all, we are talking about using air.