Opinion Letter of November 20, 2009, from Grizzle, J. David, Chief Counsel to Walden, Gregory S., Patton Boggs, LLP View Document Airport(s): Santa Fe Municipal Airport (SAF) Abstract: See Opinion Letter of November 20, 2009 from Grizzle to Montman. Index Terms: Economic Nondiscrimination (Grant Assurance 22)|Exclusive Rights (Grant Assurance 23)|Fee and Rental Structure (Grant Assurance 24)|Incentives for air service