The exchanges that want to list and trade shares of spot ether {{ETH}} exchange-traded funds are abruptly being asked by regulators to update key filings related to these products.

Exchanges are being asked to update 19b-4 filings on an accelerated basis by the U.S. Securities and Exchange Commission, three people familiar with the situation told CoinDesk, suggesting they may be moving to approve these applications ahead of a key deadline this Thursday.

That doesn't mean the ETFs will be authorized, though. Would-be issuers also need their S-1 applications approved before the products could begin trading. SEC could take an indefinite amount of time to approve the S-1 documents, one person familiar with the matter said, as it isn't tied to a deadline.

Read more: Ether Jumps 10% to $3.4K After Bloomberg Ups Odds of Spot ETF Approval