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(a). Residence by an alien in the territory of any of the Contracting Parties shall be considered lawful within the meaning of this Convention so long as there is in force in his case a permit or such other permission as is required by the laws and regulations of the country concerned to reside therein. Failure to renew any such permit, if due solely to the inadvertence of the person concerned, shall not cause him to cease to be entitled to assistance.
(b). Lawful residence shall become unlawful from the date of any deportation order made out against the person concerned, unless a stay of execution is granted.