Whenever an adjudication officer deems it advisable, he or she may require any operator or other employer to make a deposit with the Treasurer of the United States to secure the prompt and convenient payment of benefits to eligible claimants. Payments may be made from such deposit, or such deposit may be returned to an operator or other employer, only upon the order of such adjudication officer. The adjudication officer shall require the deposit of security pursuant to this section in any case where an operator or other liable employer is uninsured or has failed to secure the payment of benefits.