The FAA Chief Counsel has issued an interpretation saying that VFR aircraft must obey ATC instructions in controlled airspace:
https://www.faa.gov/about/office_or...erps/2013/Karas_2013_Legal_Interpretation.pdf
Excerpt:
"Pilots flying in controlled airspace must comply with all ATC instructions, regardless of whether the pilot is flying VFR or IFR, in accordance with § 91.123(b). ATC instructions include headings, turns, altitude instructions and general directions...A pilot flying VFR in Class E airspace, which is controlled airspace, is not required to communicate with ATC; however, if a pilot is communicating with ATC and ATC issues an instruction, the pilot must comply with that instruction."
As an attorney friend wrote on the Avsig Forum, "Some folks [can't] help but ask for legal interpretations that end up biting us in the you-know-where...Now we have a half-baked opinion on a hypothetical situation that is not the product of briefing or argument from the pilot's side and will be cited and referred to by FSDO inspectors, litigation counsel, ALJs and the NTSB in enforcement actions."
This question has previously been argued extensively in relation to class E airspace here and on other forums:
http://www.pilotsofamerica.com/forum/showthread.php?p=561036#post561036
What I'm wondering is this: Does this interpretation give ATC the authority to order a pilot to land, as was done at Gateway (IWA) last year?
http://www.pilotsofamerica.com/forum/showthread.php?t=52741
[2022 edit: Fixed broken link to the Chief Counsel opinion]
https://www.faa.gov/about/office_or...erps/2013/Karas_2013_Legal_Interpretation.pdf
Excerpt:
"Pilots flying in controlled airspace must comply with all ATC instructions, regardless of whether the pilot is flying VFR or IFR, in accordance with § 91.123(b). ATC instructions include headings, turns, altitude instructions and general directions...A pilot flying VFR in Class E airspace, which is controlled airspace, is not required to communicate with ATC; however, if a pilot is communicating with ATC and ATC issues an instruction, the pilot must comply with that instruction."
As an attorney friend wrote on the Avsig Forum, "Some folks [can't] help but ask for legal interpretations that end up biting us in the you-know-where...Now we have a half-baked opinion on a hypothetical situation that is not the product of briefing or argument from the pilot's side and will be cited and referred to by FSDO inspectors, litigation counsel, ALJs and the NTSB in enforcement actions."
This question has previously been argued extensively in relation to class E airspace here and on other forums:
http://www.pilotsofamerica.com/forum/showthread.php?p=561036#post561036
What I'm wondering is this: Does this interpretation give ATC the authority to order a pilot to land, as was done at Gateway (IWA) last year?
http://www.pilotsofamerica.com/forum/showthread.php?t=52741
[2022 edit: Fixed broken link to the Chief Counsel opinion]