81.   The key features of the system are natural gas as the main fuel.

82.   This key feature is said to eliminate concerns about early obsolescence and ensures the expansion of system capabilities as their computing needs grow.

83.   Growth generates tax revenue and reduces the cost of unemployment thus reducing the burden of public deficits which are a key feature of the qualifying conditions.

84.   Industrial relations is one exception, and both leaders have pointed to it as a key feature of their campaigns.