19-20-204. Board's policy governing creditable service. It is the duty of the retirement board to adopt policies for the determination of creditable service in the retirement system implementing the following guidelines:
(1) One year's creditable service shall be awarded for each year of full-time service, outside of vacation periods, but no more than 1 year's creditable service shall be awarded for service during the same school fiscal year.
(2) Not more than 1 month's creditable service shall be awarded for 1 or more continuous months of absence without pay.