Who has power to change from exotic to tradeable

Who has the power to convert a currency from “exotic” to “tradeable” currency. This recently happen with the IQD/GBP and I see that there is some economic news for the first time on tuesday september 14th. Does this mean it will no longer be a fixed rate?

IQD / GBP ECONOMIC CALENDAR
Tue., Sep 14
GBP 04:30 AM CPI (Y-o-Y)
GBP 04:30 AM Retail Price Index (Y-o-Y)
GBP 04:30 AM CPI (M-o-M)
GBP 04:30 AM Core CPI (Y-o-Y)
GBP 04:30 AM Retail Price Index (M-o-M)