If you did not earn at least one hour of Covered Employment after December 31, 1997, the post-1997 vesting rules above do not apply to you, and one of the older vesting rules described below may.
Vesting through May 31, 1973
The Plan initially provided that a Participant's Accrued Benefit vested upon attainment of either (i) age 55 with 10 Years of Credited Service or (ii) 30 years of service in Covered Employment with either 300 hours of Credited Service in the 12-month period following June 1, 1961, or 1,500 hours of Credited Service at any time between June 1, 1961 and May 31, 1973
Vesting from June 1, 1973, through December 31, 1975
If you were not vested as of May 31, 1973, then from June 1, 1973, through December 31, 1975, you would become vested upon earning 10 Years of Credited Service since the occurrence of any prior Permanent Break-in-Service.
If you were not vested as of December 31, 1975, then from January 1, 1976, through December 31, 1997, you would become vested upon either (i) earning 10 Years of Credited Service, or 10 Years of Pension Credit, since the occurrence of any prior Permanent Break-in-Service, or (ii) attaining Normal Retirement Age before incurring a Permanent Break-in-Service.