from the whitepaper: The Libra Association also serves as the entity through which the Libra Reserve is managed, and hence the stability and growth of

from the whitepaper: The Libra Association also serves as the entity through which the Libra Reserve is managed, and hence the stability and growth of the Libra economy are achieved. The association is the only party able to create (mint) and destroy (burn) Libra. Coins are only minted when authorized resellers have purchased those coins from the association with fiat assets to fully back the new coins. Coins are only burned when the authorized resellers sell Libra coin to the association in exchange for the underlying assets. Since authorized resellers will always be able to sell Libra coins to the reserve at a price equal to the value of the basket, the Libra Reserve acts as a “buyer of last resort.” These activities of the association are governed and constrained by a Reserve Management Policy that can only be changed by a supermajority of the association members.