Subject to § 315.803(b), when an agency proposes to terminate an employee serving a probationary or trial period for reasons based in whole or in part on conditions arising before his appointment, the employee is entitled to the following:

(a) Notice of proposed adverse action. The employee is entitled to an advance written notice stating the reasons, specifically and in detail, for the proposed action.

(b) Employee's answer. The employee is entitled to a reasonable time for filing a written answer to the notice of proposed adverse action and for furnishing affidavits in support of his answer. If the employee answers, the agency shall consider the answer in reaching its decision.

(c) Notice of adverse decision. The employee is entitled to be notified of the agency's decision at the earliest practicable date. The agency shall deliver the decision to the employee at or before the time the action will be made effective. The notice shall be in writing, inform the employee of the reasons for the action, inform the employee of his right of appeal to the Merit Systems Protection Board (MSPB), and inform him of the time limit within which the appeal must be submitted as provided in § 315.806(d).