The Hindu Marriage Act, 1955
NULLITY OF MARRIAGE AND DIVORCE
Section 15: Divorced Persons When May Marry Again
Bare Act
When a marriage has been dissolved by a decree of divorce and either there is no right of appeal against the decree or, if there is such a right of appeal, the time for appealing has expired without an appeal having been presented, or an appeal has been presented but has been dismissed, it shall be lawful for either party to the marriage to marry again.
Simplified Act
Once a marriage is officially ended by a divorce decree, and there's no chance to appeal (or the time to appeal is over without anyone actually appealing, or if an appeal was made but didn't succeed), then both people who were in the marriage are free to get married to someone else.
Explanation using examples
Imagine a couple, Ravi and Priya, who decided to get a divorce due to irreconcilable differences. After the family court granted them a decree of divorce, Priya wanted to start anew and was considering remarrying. According to Section 15 of The Hindu Marriage Act, 1955, since their divorce decree has been issued and there were no appeals against it within the stipulated time, or if there were any appeals they were dismissed, it is perfectly legal for Priya to marry someone else.

