(a) Cure notice. If a contract is to be terminated for default before the delivery date, a "Cure Notice" is required by the Default clause. Before using this notice, it must be ascertained that an amount of time equal to or greater than the period of "cure" remains in the contract delivery schedule or any extension to it. If the time remaining in the contract delivery schedule is not sufficient to permit a realistic "cure" period of 10 days or more, the "Cure Notice" should not be issued. (b) Show cause notice. If the time remaining in the contract delivery schedule is not sufficient to permit a realistic "cure" period of 10 days or more, the following "Show Cause Notice" may be used. It should be sent immediately upon expiration of the delivery period.