Here's the source for the $0.70/gal tax:

1.. The FAA divided the total pool of projected FY 2009 air traffic costs
allocated to general aviation and commercial piston users by the fiscal year
2009 tax yield to calculate a common fuel tax rate for this group of 56.4
cents per gallon. The AIP fuel tax of 13.6 cents per gallon was added to
this figure for the proposed total of 70.0 cents per gallon.

"BDS" wrote in message
news
"Steve Foley" wrote

http://www.faa.gov/regulations_polic...authorization/

Washington Headquarters Press Release
For Immediate Release

Some details:

"Jet and turboprop flights currently subject to the ticket tax-including
domestic, international, passenger, cargo, charter, air taxi, and
fractional
operators-would pay their fair share of air traffic costs via user fees."

"GA and piston users will pay their fair share of FAA costs through a fuel
tax, their preferred mechanism. The tax rates are based on a detailed cost
allocation, and would change every two years in line with an updated cost
allocation study. All domestic commercial and GA users will also pay a
common fuel tax of 13.6 cents per gallon to fund AIP, the Essential Air
Service program and FAA's Research, Engineering and Development account."

It seems to me that lots of GA users will be able to avoid this altogether
if they have an STC to use mogas.

BDS