(b) default in the payment of all or any part of the principal or any premium on any of the Notes of such series as and when the same shall become due and payable either at maturity, upon redemption, by declaration or otherwise, and the continuance of such default; or
(c) default in the performance, or breach, of any covenant or warranty of the Company in respect of the Notes of such series (other than a default specified in clauses (a) or (b) above) and continuance of such default or breach for a period of 60 days after there has been given, by registered or certified mail, to the Company by the Trustee or to the Company and the Trustee by the Holders of at least 25% in principal amount of the Notes of such series, a written notice specifying such default or breach and requiring it to be remedied and stating that such notice is a “Notice of Default” hereunder;
(d) (1) a default by the Company or any of its Subsidiaries in the payment of any principal at maturity of any Indebtedness (other than the Notes) aggregating more than $50,000,000 in principal amount, when due and payable after giving effect to any applicable grace period; or (2) a default by the Company or any of its Subsidiaries in the performance of any other term or provision of any Indebtedness (other than the Notes) aggregating more than $50,000,000 in principal amount that results in such Indebtedness becoming or being declared due and payable prior to the date on which it would otherwise become due and payable, and such acceleration shall not have been rescinded or annulled or such indebtedness shall not have been discharged within a period of 30 days after there has been given to the Company by the Trustee or given to the Company and the Trustee by the Holders of at least 25% in aggregate principal amount of the outstanding Notes of such series, a written notice specifying such default or defaults; provided, however, that if the default under such Indebtedness is cured, or waived by the holders of the Indebtedness, in each case as permitted by the governing instrument, then the event of default caused by such default will be deemed likewise to be cured or waived; or
(e) a court having jurisdiction in the premises shall enter a decree or order for relief in respect of the Company in an involuntary case under any applicable bankruptcy, insolvency or other similar law now or hereafter in effect, or appointing a receiver, liquidator, assignee, custodian, trustee or sequestrator (or similar official) of the Company or for all or substantially all of its property and assets or ordering the winding up or liquidation of its affairs, and such decree or order shall remain unstayed and in effect for a period of 60 consecutive days; or
(f) the Company shall commence a voluntary case under any applicable bankruptcy, insolvency or other similar law now or hereafter in effect, or consent to the entry of an order for relief in an involuntary case under any such law, or consent to the appointment of or taking possession by a receiver, liquidator, custodian, trustee or sequestrator (or similar official) of the Company or for any substantial part of its property and assets, or make any general assignment for the benefit of creditors.
If an Event of Default described in clauses (a), (b), (c) or (d) occurs and is continuing, then, and in each and every such case, unless the principal of all of the Notes of such series shall have already become due and payable, either the Trustee or the Holders of not less than 25% in aggregate principal amount of the Notes of such series then outstanding hereunder, by notice in writing to the Company (and also to the Trustee if given by Holders), may declare the entire principal of all of the Notes of such series and the interest accrued thereon, if any, to be due and
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