Border control at internal borders shall only be reintroduced as a last resort, and in accordance with Articles 27, 28 and 29.
Ní athbhunófar rialú teorann ag teorainneacha inmheánacha ach mar rogha dheiridh, agus i gcomhréir le hAirteagal 27, le hAirteagal 28 agus le hAirteagal 29.