If I want to fly an aircraft without a transponder (or soon, without ADSB out) in airspace that requires it according to 91.215(b)(2) (the "mode C veil"), 91.215(d)(3) says, "For operation of an aircraft that is not equipped with a transponder, the request must be made at least one hour before the proposed operation." I presume that means a phone call? But just who do I call, and where do I find the number? Has anybody here done that, and how likely is it they would approve it? Only in good VFR weather, of course. For example, New York. I live in CT. Flying an open cockpit biplane, it's not likely I'll ever want to actually fly in the Class B or C airspace, but I may well want to cut close around it (within 30NM) or under the 3000' floor of the outer ring while going somewhere, or fly over our cabin which is one mile inside the 30NM ring, or even fly the Hudson River corridor like I used to do years ago in my T-Craft.