Final answer:
The demotion authority has up to 6 months to restore an Airman's date of original grade after the effective date of the demotion.
Step-by-step explanation:
The demotion authority has the ability to restore an Airman's date of original grade within a certain period of time after the effective date of the demotion. According to the law, the authority has up to 6 months to restore the Airman's date of original grade. This means that if a demotion occurs, the authority has a maximum of 6 months to rectify the demotion by restoring the Airman's date of original grade.