On pain of inadmissibility, the application shall state the grounds on which it is based, be dated and signed, as appropriate, by the foreign national or his representative or by the administrative authority that ordered the detention.
When the application is made by the administrative authority, it shall be accompanied by any useful supporting documents, in particular a copy of the register provided for in article L. 744-2.
When the application is made by the foreign national or his representative, the contested decision shall be produced by the administration. The same applies, at the request of the liberty and custody judge, to the copy of the register.