им не разрешили сойти с самолета по

им не разрешили сойти с самолета пока они не заполнили бланк декларации

Результаты (английский) 1:

they were not allowed to get off the plane until they have completed the Declaration form

Результаты (английский) 2:

they were not allowed to leave the aircraft until they are completed declaration form

Результаты (английский) 3:

they were not allowed off the plane until they fill in the form