14 CFR 101.13 : Aeronautics And Space (§ 1.1 To Parts 1311-1399) — (§ 60.1 To Parts 108-109) — Federal Aviation Administration, Department Of Transportation (Continued) (§ 60.1 To Parts 108-109) — Air Traffic And General Operating Rules (§ 91.1 To Parts 108-109) — Moored Balloons, Kites, Amateur Rockets And Unmanned Free Balloons (§ 101.1 To Subpart E) — Moored Balloons And Kites (§ 101.11 To § 101.19) — Operating limitations.

(a) Except as provided in paragraph (b) of this section, no person may operate a moored balloon or kite -

(1) Less than 500 feet from the base of any cloud;

(2) More than 500 feet above the surface of the earth;

(3) From an area where the ground visibility is less than three miles; or

(4) Within five miles of the boundary of any airport.

(b) Paragraph (a) of this section does not apply to the operation of a balloon or kite below the top of any structure and within 250 feet of it, if that shielded operation does not obscure any lighting on the structure.