undrawn commitment less related fees. Our primary ongoing liquidity requirements are to finance working capital, capital expenditures and debt service.
In February 2024, NCLC and the Commitment Parties entered into the third amended commitment letter, which became effective in March 2024. Pursuant to the third amended commitment letter, the Commitment Parties have agreed to purchase from NCLC an aggregate principal amount of $650 million of senior unsecured notes due five years after the issue date at NCLC’s option, which option is available through March 2025. In connection with the execution of the third amended commitment letter, NCLC agreed to repurchase all of the outstanding $250 million aggregate principal amount of 9.75% senior secured notes due 2028 at a negotiated premium plus accrued and unpaid interest thereon.
Additionally, in April 2024, a €200 million commitment became available that can be used for future newbuild payments.
See Note 6 – “Long-Term Debt” for further details about the above financing transactions.
Based on our liquidity estimates and our current resources, we have concluded we have sufficient liquidity to satisfy our obligations for at least the next 12 months. There can be no assurance that the accuracy of the assumptions used to estimate our liquidity requirements will be correct, and our ability to be predictive is uncertain due to the dynamic nature of the current operating environment, including any current macroeconomic events and conditions such as inflation, rising fuel prices and higher interest rates. We intend to refinance the $565.0 million 3.625% senior unsecured notes due in December 2024 prior to September 2024. Within the next twelve months, we may pursue other refinancings in order to reduce interest expense and/or extend debt maturities. There is no assurance that cash flows from operations and additional financings will be available in the future to fund our future obligations. Beyond the next 12 months, we will pursue refinancings and other balance sheet optimization transactions in order to reduce interest expense and/or extend debt maturities. Refer to Item 1A, “Risk Factors” in our Annual Report on Form 10-K for further details regarding risks and uncertainties that may cause our results to differ from our expectations.
At March 31, 2024, we were in compliance with all of our debt covenants. If we do not continue to remain in compliance with our covenants, we would have to seek additional amendments to or waivers of the covenants. However, no assurances can be made that such amendments or waivers would be approved by our lenders. Generally, if an event of default under any debt agreement occurs, then pursuant to cross default and/or cross acceleration clauses, substantially all of our outstanding debt and derivative contract payables could become due, and all debt and derivative contracts could be terminated, which would have a material adverse impact to our operations and liquidity.
Our Moody’s long-term issuer rating is B2, our senior secured rating is B1 and our senior unsecured rating is Caa1. Our S&P Global issuer credit rating is B+, our issue-level rating on our $1.2 billion Revolving Loan Facility, $600 million 8.375% senior secured notes due 2028 and $790 million 8.125% senior secured notes due 2029 is BB, our issue-level rating on our other senior secured notes is BB- and our senior unsecured rating is B. If our credit ratings were to be downgraded as has occurred in the past, or general market conditions were to ascribe higher risk to our rating levels, our industry, or us, our access to capital and the cost of any debt or equity financing will be negatively impacted. We also have capacity to incur additional indebtedness under our debt agreements and may issue additional ordinary shares from time to time, subject to our authorized number of ordinary shares. However, there is no guarantee that debt or equity financings will be available in the future to fund our obligations, or that they will be available on terms consistent with our expectations.
As of March 31, 2024, we had advance ticket sales of $3.8 billion, including the long-term portion, which included approximately $66.0 million of future cruise credits that have been issued as face value reimbursement for cancelled bookings due to COVID-19. We also have agreements with our credit card processors that, as of March 31, 2024, governed approximately $3.4 billion in advance ticket sales that had been received by the Company relating to future voyages. These agreements allow the credit card processors to require under certain circumstances, including the existence of a material adverse change, excessive chargebacks and other triggering events, that the Company maintain a reserve which would be satisfied by posting collateral. Although the agreements vary, these requirements may generally be satisfied either through a percentage of customer payments withheld or providing cash funds directly to the card processor. Any cash reserve or collateral requested could be increased or decreased. As of March 31, 2024, we had cash