NICOSIA--Uninsured depositors of Cyprus Popular Bank PCL (CPB.CP), also known as Laiki Bank locally, could lose up to 40% of their savings if the government proceeds with a proposed restructuring plan to split its assets into good and bad as part of efforts to unlock aid from international lenders and reopen its banking system, European and Cypriot officials with knowledge of the plan said Friday.

The bank's resolution would reduce by 3.6 billion euros ($4.65 billion) the EUR5.8 billion that Cyprus has been asked to raise on its own to secure a EUR10 billion bailout from the euro zone and the International Monetary Fund, another official said.

The Cypriot government rushed to parliament late Thursday a range of draft bills regulating the resolution of banks and introducing restrictions on financial transactions to stem potential outflows once the banks reopen. The proposals will allow authorities to restrict noncash transactions, freeze check cashing, limit withdrawals and even convert checking accounts into fixed term deposits.

One of the officials said these measures could be in place "for months."

Two European officials said it was imperative that Cypriot lawmakers pass Friday two bills outlining capital-control measures and the bank-resolution process to allow the country's banks to reopen Tuesday as scheduled. The bills were expected to be debated in parliament later Friday. The banks have been closed since March 16 when Cyprus agreed on a EUR10 billion bailout from the EU and the IMF that would have seen all deposits taxed with a one-off levy. But the plan was met with furious public opposition and was rejected earlier this week by Cyprus' parliament.

"Without these measures in place we're looking at an instant bank run. There's no way depositors won't try to move cash out and restoring some confidence could take months," one European official said.

Write to Matina Stevis at matina.stevis@dowjones.com

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