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S&S 4065 – The [Message sender] (MesSenMES3) must follow the exact pattern “[A-Z]{2}[^\n\r]{1,15}/[0-9]{10}” (2 capital letters + 1–15 characters + slash + exactly 10 digits).
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S&S 8102 – Each goods item must have a unique [Item number] starting from 1 and increasing by 1 (1, 2, 3, …).
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S&S 8103 – [Gross mass] (GroMasGDS46) is required on every goods item unless Specific circumstance indicator = ‘E’ or Total gross mass is provided at header level.
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S&S 8104 / 8136 – Place of loading must be present unless it is explicitly not required; duplicate entries are forbidden.
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S&S 8105 – When SpeCirInd = ‘E’, the Consignee TIN (TRACONCE1/TINCE1) is mandatory.
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S&S 8107 – Required when Transport mode at border = 1 (maritime) or 8 (inland waterway).
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S&S 8108 – Required when Transport mode at border = 3, 10 or 11 AND Identity of means of transport is filled.
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S&S 8109 / 8116 – Total number of packages at header must be present only if at least one PACGS2 exists; must not be present otherwise.
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S&S 8111 – When first digit of SpeCirInd is ‘C’, Transport mode at border cannot be 1, 2, 4, 8, 10 or 11.
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S&S 8112 – When first digit is ‘D’, Transport mode cannot be 1, 3, 4, 8, 10 or 11.