B.2 Vesting in Your Normal Retirement Age Benefits if You Have Not Been a Participant After June 30, 1999. If you have been a Participant and were not in a Break in Service after June 30, 1990 but have not been a Participant after June 30, 1999, you become vested as shown in the following table: Years of Vesting Service Percent Vested Less than 5 0% 5 (after June 30, 1990) but less than 10 50% 10 or more 100% The Normal Retirement Age vesting rules in Section 3, Vesting otherwise apply, except where it appears in Section 3.2,Vesting Service, 250 hours is increased to 1,000 hours, and where it appears in Section 3.4, Break-in-Service, 250 hours is increased to 500 hours.