1. at least one time (FAAH 7110.65, paragraph 2-111c(1))
2. 10 minutes, 20 miles (FAAH 7110.65, paragraph 6-33)
3. holding pattern airspace does not overlap (FAAH 7110.65,
paragraph 6-40c)
4. if assigned an altitude below 18,000 feet (FAAH 7110.65,
paragraph 6-40b)
5. 2,000 feet (FAAH 7110.65, paragraph 6-51b)