Introduced in a bid to curb in-season development, and the resultant costs, the token system was unpopular and unnecessarily complicated. The tokens allowed engine manufacturers to update various components, which all had a specific (token) value. However, to add to the confusion, not only was the amount of tokens decreased over the six years the rule was due to be in place (2015 - 2020), there was a system whereby certain parts could not be updated after a certain point. Initially the sliding scale would have seen manufacturers allowed 25 tokens this season but following a meeting of the engine manufacturers last October this was raised to 32. At the same time restrictions on those areas...
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