This is an example of a "pegged" exchange rate.
A pegged, or fixed system, is one in which the conversion scale is set and misleadingly kept up by the administration. The rate will be pegged to some other nation's dollar, more often than not the U.S. dollar. The rate won't change from everyday.
A government needs to work to keep their pegged rate stable. Their national bank must hold huge stores of remote cash to moderate changes in free market activity. In the event that a sudden interest for a money were to drive up the swapping scale, the national bank would need to discharge enough of that cash into the market to take care of the demand. They can likewise purchase up cash if low interest is bringing down trade rates.
