The amount of any tethered coin should be variable, based on the credit deposited in the bank and EAED is no exception. For this reason the Issuer Account is not locked and new coins can be issued or burned, based on demand...
The E-AED (asset code EAED) or Electronic Dirham is a Stellar-based coin tethered 1:1 to United Arab Emirates Dirham. The electronic coin is backed by fiat money deposited in UAE bank accounts, audited periodically by a 3rd party auditor. The proof for the value behind the coin are posted regularly on the eaed.ae website...
This is a no-nonsense coin for payments and storing value. You can use it to store value tethered to a fiat asset or just pay for services and goods. Day-to-day payments will work fine with EAED, since the confirmation time is near-instant and micro-payments are a core-feature for the Stellar technology.