Iowa Code § 307.48: Longevity pay.

1. An employee of the department who was hired by the state highway commission on or before June 30, 1971, is entitled to longevity pay. An employee eligible for longevity pay under this section whose employment is terminated on or after July 1, 1971, if reemployed by the department, forfeits any right the employee may have had to longevity pay.

2. An employee who became an employee of the state department of transportation on July 1, 1974, retains all rights to longevity pay so long as the employee continues employment with the department.

3. An employee of the office of motor vehicle enforcement of the department of transportation on June 30, 2023, who is transferred to the department of public safety pursuant to 2023 Iowa Acts, ch. 85, retains all rights to longevity pay.