As used herein, the following terms shall have the meanings indicated:
BOARD
The Board of Administration provided for in Article XXV of the plan.
CREDITED SERVICE
Computed to the nearest 1/12 year, the time commencing when a person qualifies as an employee under the plan pursuant to the definition of "employee" below and ending with the date upon which an employee ceases to be an employee as defined below, subject to the limitations set forth in Article XXIX.
A. 
An employee shall be deemed to be an employee of the Library during all periods in which the person is in an employment relation with one of the libraries administered by the Library; is on military leave, subject to the approval of the Board; or is on approved sick leave, not to exceed one year. In addition, for purposes of Article XXVIII, §§ 51-82 and 51-83, if an employee severs his or her service with the Library by reason of a quit, retirement or discharge and returns to work within 12 months after the date on which he or she was first absent from service (by reason of the severance or otherwise), his period of severance shall be treated as a period of employment with the Library; and any period of absence not in excess of one year for any reason other than a than a quit, retirement, discharge or death, such as vacation, holidays, leave of absence or layoff, shall be treated as a period of employment with the Library.
B. 
An employee whose service was previously excluded from his or her credited service under the definition of credited service may purchase an amount of credited service (not to exceed the number of years of service previously excluded) at the cost of 5% of the employee's current base rate of annual earnings multiplied by the number of years of credited service desired to be purchased. An employee shall have 30 days to accept the Library's determination of the cost of purchasing such years of credited service and, upon acceptance, shall have to pay for such credited service through payroll withholding. Credit for such service shall only be given when the full payment has been made.
C. 
Employees with military service prior to their credited service with the Library may purchase years of credited service for such years served in the military. The entire cost of purchasing such service, as determined by the actuary for the plan, shall be borne by the employee.
D. 
Within 60 days after the date on which this revised and restated chapter is adopted, employees with prior periods of service with one of the libraries administered by the Library during which time they were not participating in the plan and thus not accruing years of credited service shall be entitled to elect to purchase years of credited service for all or a portion of such years of service. Employees who make the foregoing election shall specify within the election whether all or a portion of such prior service will be purchased. The entire cost of purchasing such service, as determined by the actuary for the plan, shall be borne by the employee, and the employee shall pay such cost on or before March 1, 1993, in a lump sum, through payroll withholding or through an installment payment program acceptable to the Library.
EMPLOYEE
Any person who, on or after the effective date, is an employee of the Library and is assigned to one of the libraries administered by the Library; provided, however, that employees who regularly work less than 35 hours per week shall not be eligible to participate in the plan. Employees shall be considered employees of the Town for purposes of this chapter. Each employee shall qualify as an employee under the plan on the employee's date of hire. Under prior plan provisions, an employee qualified as an employee on the later of the employee's date of hire or the employee's 25th birthday, except that an employee who was hired on or after July 1, 1983, qualified as an employee under the plan from his or her date of hire. An employee who was affected by such prior plan requirements shall qualify as an employee retroactive to such employee's date of hire; provided, however, that credited service for such period of retroactive participation in the plan shall be subject to the rules set forth in the definition of "credited service."