Service credit is based on actual hours worked, excluding any
  overtime. The following types of service credit, if purchased,
  can count toward a member’s total service credit:
  - Redeposit of prior membership contributions
  
 
  - Prior ineligible service such as extra help, temporary,
  seasonal or hourly
  
 
  - Medical Leave (personal illness not to exceed 12 consecutive
  months)
  
 
  Military Leave is also a service credit. Members who re-sign to
  enter military service must re-enter employment within one year
  of termination of military service. Employees who take a leave of
  absence for military service must return to Merced County service
  within one year of separating from military service to be
  eligible for purchase.
  Sick Leave
  At retirement your sick leave balance may be converted into years
  of service for retirement purposes only. Please review your
  bargaining unit Memorandum of Understanding (MOU) to determine
  what can be applied to retirement. You may be eligible to convert
  your sick leave balance into retirement years of service credit,
  depending on your MOU and if you retire directly from an
  MercedCERA participating employer (deferred and Merced Cemetery
  District members are not eligible to convert sick leave hours
  into retirement service credit). Sick leave balances converted
  into retirement service credit are not used to determine
  eligibility for retirement.