(C) The date on which the participant initially became eligible for a designated distribution under the plan and, if different, the date of payment of the initial designated distribution. (D) The dates of each period of service under the plan that did not constitute employment as defined in section 210 for purposes of this title, and the dates of any other period of service under the plan. . (d) Definitions In this section— (1) the term noncovered pension means a pension any part of which is based on noncovered service (within the meaning of section 215(a)(7) of the Social Security Act ( 42 U.S.C. 415(a)(7) ))