Priority of lists. When more than one list exists, the priority of lists shall be as follows:
a. Special reemployment when the available position is in the department from which the eligible was laid off or demoted in lieu of layoff;
b. Promotional;
c. Special reemployment when the available position is located in a department other than that from which the eligible was laid off or demoted;
d. Regular reemployment, police reemployment or fire reemployment; and
e. Open competitive.