So long as any of the Debentures remain outstanding, the Company will maintain in Wilmington, Delaware, an office or agency where the Debentures may be presented for payment, an office or agency where the Debentures may be presented for registration of transfer and for exchange as in this Indenture provided and an office or agency where notices and demands to or upon the Company in respect of the Debentures or of this Indenture may be served. The Company will give to the Trustee written notice of the location of any such office or agency and of any change of location thereof. Until otherwise designated from time to time by the Company in a notice to the Trustee, or specified as contemplated by Section 2.5, such office or agency for all of the above purposes shall be the office or agency of the Trustee. In case the Company shall fail to maintain any such office or agency in Wilmington, Delaware, or shall fail to give such notice of the location or of any change in the location thereof, presentations and demands may be made and notices may be served at the Principal Office of the Trustee.