What is the ruling on Ila' if either spouse commits apostasy (Riddah)?

Primary text

If a husband vows Ila' while in a state of apostasy, the waiting period is not counted until both parties return to Islam. If apostasy occurs during the waiting period, the period is interrupted because the marriage contract is dissolved, prohibiting intercourse. Upon their return to Islam, the waiting period must be restarted, whether the apostasy occurred from him, her, or both.