It is a guiding principle of this Act that a decision, policy, program or process should integrate the competing long-term, medium-term and short-term environmental, economic, health and other social considerations relating to climate change to ensure that—
(a) all relevant issues relating to climate change associated with the decision, policy, program or process are taken into consideration during the decision making process; and
(b) there is a proper examination of all the issues which are relevant to climate change; and
(c) any measures adopted as a result of the decision, policy, program or process are cost effective and in proportion to the problems relating to climate change that are relevant to the decision, policy, program or process.