Full Time, Part Time, and Seasonal Employees. The parties mutually recognize that the unique nature of the operation of a public school district necessitates that certain positions be for less than full twelve-month period each year and, further, that during the summer months when school is not in session a limited part of the total work force may consist of seasonal employees for outside employees, and finally, in some full time positions under extreme circumstances it could become necessary to employ a substitute on a day-to-day basis. To distinguish these various positions the following definitions are agreed upon:
