Sec. 91.155 Basic VFR weather minimums.
(a) Except as provided in paragraph (b) of this section and Sec. 91.157, no person may operate an aircraft under VFR when the flight visibility is less, or at a distance from clouds that is less, than that prescribed for the corresponding altitude and class of airspace in the following table:
Class B 3 sm clear of clouds Class C 3 sm 500 ft below
1,000 ft above
2,000 ft horizontal Class D 3 sm 500 ft below
1,000 ft above
2,000 ft horizontal Class E
Less than 10,000 ft MSL 3 sm 500 ft below
1,000 ft above
2,000 ft horizontal Class E
At or above 10,000 ft MSL 5 sm 1,000ft below
1,000 ft above
1 sm horizontal