2,817. When the Ability to Annul Vows Takes Effect

Hilchos Nedarim 11:8

A husband can annul his wife’s vows and oaths from the time she enters the chuppah until such time as they may divorce and the get reaches her hand. If there’s a doubt about the divorce, he may not annul her vows. If he gives her a conditional get or a get that takes effect in the future, he may not annul her vows in the interim. Similarly, if a wife heard that her husband died and she remarried, but her husband later turned up alive, neither her first husband nor her second husband may annul her vows. If a woman was prohibited to her husband by a negative commandment and her husband annulled her vows, the vows are effectively annulled. It should go without saying that this is also the case if she is prohibited to him by a positive commandment.

Hilchos Nedarim 11:9

If a naarah (a maiden, i.e., a girl from 12 to 12½) is betrothed, her vows can only be canceled by her father and her fiancé together. If one of them annulled her vow alone, it is not effectively annulled. If her fiancé annulled her vow alone and she violated the vow before her father also annulled it, she is not liable to the penalty of lashes.