Don't they have some requirement by law to always look to the next 50 years or something rather than the usual politician outlook of "however long I am in offic

Don't they have some requirement by law to always look to the next 50 years or something rather than the usual politician outlook of "however long I am in office for, to benefit me the most." I would imagine over the next 50 years oil and gas is going to be a worst investment than renewable simply because by then it will have largely run out? Then again when companies such as BP are increasing their investments into renewable energy sources it makes sense to see Norway doing the same.