Tap any paragraph to write a margin note. Your notes collect in the Desk below the text and file under cases with @. The side-by-side margin rail opens on a larger screen.

§
Marginalia
Code · CFR · Title 14 — Aeronautics and Space · Part 91 — General Operating and Flight Rules · § 91.173

§ 91.173. ATC clearance and flight plan required.

28 words·~1 min read·/us/cfr/t14/s§ 91.173·

A research copy — for the controlling text, always check the official state or federal source. Not legal advice.

No person may operate an aircraft in controlled airspace under IFR unless that person has—
(a)Filed an IFR flight plan; and
(b)Received an appropriate ATC clearance.
Connections12 cite this
Citation graph
cites case law
§ 91.173
ATC clearance and flight plan required.
Fed. Reg.×12
Cites 0Cited by 12 across 1 source
★   the supreme law of the land   ★
Don't Tread on Me
E Pluribus Unum — out of many, one

"If you don't know your rights, you don't have any."

Marginalia · a citizen's law index
A research desk, not legal advice. Always read the cited source before relying on a summary.
Questions or an issue? support@self-law.org
disclaimerMarginalia is a research index, not a law firm. Nothing on this site is legal, tax, or financial advice and no attorney–client relationship is formed by using it. Statutes, regulations, and case law change; summaries, search results, AI output, and member posts may be incomplete, out of date, or wrong. Any interpretation drawn from material on this site should be validated by a licensed attorney in your jurisdiction before you act on it.