| Amendments and corrections |
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| July 1, 1981 | Modified by 31981R1372
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| July 1, 1981 | Modified by 31981R1371
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| July 1, 1981 | Repealed by
31981R1371
31981R1372
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| January 1, 1981 | Modified by 31980R3476
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| December 15, 1980 | Modified by 31980R2844
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| July 1, 1980 | Modified by 31980R1490
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| June 25, 1979 | Modified by 31979R1150
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| March 28, 1979 | Modified by 31979R0708
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| January 1, 1979 | Modified by 31978R2117
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| October 1, 1978 | Modified by 31978R1947
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| November 30, 1977 | Modified by 31977R2505
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| September 1, 1977 | Modified by 31977R1556
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| July 1, 1977 | Modified by 31977R1474
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| July 1, 1977 | Modified by 31977R1234
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| April 16, 1977 | Modified by 31977R0750
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| 1977 | Modified by 31977R2505
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| July 1, 1976 | Modified by 31976R1577
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| June 26, 1976 | Modified by 31976R1498
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| May 17, 1976 | Modified by 31976R1040
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| November 1, 1975 | Modified by 31975R2819
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| July 1, 1975 | Entry into force - See Art 19 See Art 21
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| June 1, 1975 | Entry into force - See Art 21
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