Is Iila' valid regarding a wife who has a permanent physical impediment preventing intercourse (Ratzqa' or Qarana')?

Primary text

Iila' is not valid concerning a woman who is Ratzqa' (imperforate) or Qarana' (fused vulva) because intercourse is perpetually impossible, and thus the oath concerning its abandonment is not established, similar to an oath not to ascend to the sky. If the ruling is that it is valid and the waiting period is set, then the husband must perform the required return (fi'ah) in the manner of one with an excuse, as intercourse in her case is impossible, preventing a demand for it, similar to a eunuch.