FAA Federal Aviation Regulations (FARS, 14 CFR)

No person may conduct a parachute operation, and no pilot in command of an aircraft may allow a parachute operation to be conducted from that aircraft --

(a) Into or through a cloud, or

(b) When the flight visibility or the distance from any cloud is less than that prescribed in the following table:

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Flight
visibility
Altitude                 (statute   Distance from clouds
miles)
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1,200 feet or less above the surface      3       500 feet below, 1,000
regardless of the MSL altitude.                   feet above, 2,000
feet horizontal.
More than 1,200 feet above the            3       500 feet below, 1,000
surface but less than 10,000 feet                 feet above, 2,000
MSL.                                              feet horizontal.
More than 1,200 feet above the            5       1,000 feet below,
surface and at or above 10,000 feet               1,000 feet above, 1
MSL.                                              mile horizontal.
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