| Amendments and corrections |
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| December 31, 1980 | At the latest
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| December 18, 1978 | Modified by 31978R2949
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| December 4, 1978 | Modified by 31978R2823
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| August 5, 1978 | Modified by 31978R1857
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| June 5, 1978 | Modified by 31978R1206
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| May 1, 1978 | Modified by 31978R2413
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| April 11, 1978 | Modified by 31978R0718
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| October 30, 1977 | Modified by 31977R2380
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| September 23, 1977 | Modified by 31977R2077
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| August 1, 1977 | Modified by 31977R1724
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| May 1, 1977 | Modified by 31977R0920
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| April 1, 1977 | Modified by 31977R0681
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| March 1, 1977 | Modified by 31977R0421
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| February 1, 1977 | Modified by 31977R0210
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| November 22, 1976 | Modified by 31976R2808
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| September 6, 1976 | Modified by 31976R2166
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| August 23, 1976 | Entry into force - Date pub. + 3 See Art 17
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