45 CFR §286.110

1. (a)An adult or minor head-of-household taking part in a work activity outlined in § 286.100 cannot fill a vacant employment position if:
   1. (1)Any other individual is on layoff from the same or any substantially equivalent job; or
   2. (2)The employer has terminated the employment of any regular employee or otherwise caused an involuntary reduction in its work force in order to fill the vacancy with the TANF participant.
2. (b)A Tribe must establish and maintain a grievance procedure to resolve complaints of alleged violations of this displacement rule.
3. (c)This regulation does not preempt or supersede Tribal laws providing greater protection for employees from displacement.