ED Decision 2009/005/R
The balloon must be capable of climbing at least 90 metres in the first minute from a start in equilibrium at ground level. Compliance must be shown at the maximum mass appropriate to the conditions of the test. (See AMC 31HB.17)
ED Decision 2009/005/R
“Conditions of the test” here refers to the combination of launch field elevation (launch altitude) and corresponding ambient air temperature. The test should be conducted at minimum specified burner fuel pressure.