This airspace for high altitude wave flights was created through the hard work of a few ASC members in the early 1970s, principally by Dick Mamini and Bruce Hea. A map of the Livingstone Block is in the Cowley Guide. When operated by the Alberta Soaring Council, this airspace is normally open to 28,000 feet (this is a "relatively" safe upper limit, easily allowing Diamond climbs). If a higher ceiling has been opened by Alberta Soaring Council for a record attempt, for example, pilots above 28,000 feet must be in positive radio contact with Cowley Ground, who are "legally" responsible to ATC for flight following. The airspace above 28,000 is only opened by prior telephone contact with ATC by the camp organizers – not by radio call-in at the moment.