One way to categorize waves is to say that there are longitudinal and transverse waves. In a transverse wave, particles of the medium are displaced in a direction perpendicular to the direction of energy transport. In a longitudinal wave, particles of the medium are displaced in a direction parallel to energy transport.
Seven plans allowed normal retirement within these ages. Six of them required at least 30 years of service for normal retirement. Only two of the plans continue to allow normal retirement within these ages. Both now require a minimum age of 57 and at least 30 years of service. For most plans the minimum age requirement increased to the range of age 60 to age 62. Age 60.
A public employee must have a minimum amount of service and must reach a. certain age to receive retirement benefits. Generally, a public employee must have at least three years of service credit in a Minnesota. public pension plan to be eligible for retirement benefits. An employee who has met this three-. year minimum, known as the vesting period, also must reach a certain age before beginning to.