Once a petition by either or both of the spouses has been filed as permitted by Section 25-381.09, the filing of any subsequent petition under such section within one year thereafter by either or both of the spouses shall not stay any action for annulment, dissolution of marriage, or legal separation then pending nor prohibit the filing of such an action by either party. The filing of a subsequent petition by either or both of the spouses more than one year after the filing of any previous petition with such effect shall have the same effect toward staying any domestic relations action then pending and toward prohibiting the filing of any such action as provided in Section 25-381.18.