question| Is it valid to consecrate a moving structure as a mosque, whether it be a structure such as a trailer or a mobile home, which is moved at most once every few months, or an area such as a compartment in a railroad passenger car or an airplane, which is regularly on the move?

answer| As a matter of mandatory caution (iḥtīyāṭ wājib), the consecration of both types of moving structures mentioned in the question is valid and must be honored as such.