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Protocol for the Protection of Cultural Property in the Event of Armed Conflict. The Hague, 14 May 1954.
III - Para. 6.
6. The present Protocol shall bear the date of 14 May 1954 and, until the date of 31 December 1954, shall remain open for signature by all States invited to the Conference which met at The Hague from 21 April 1954 to 14 May 1954.