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Technical rule [CURRENT]
TWENTY-FIFTH EDITION, NOVEMBER 2021, API MONOGRAM PROGRAM EFFECTIVE DATE: NOVEMBER 2022; ERRATA 1, DECEMBER 2021; ERRATA 2, APRIL 2022; ERRATA 3, OCTOBER 2023; ADDENDUM 1, APRIL 2023 (API MONOGRAM PROGRAM EFFECTIVE DATE: OCTOBER 2023); ADDENDUM 2, SEPTEMBER 2024 (API MONOGRAM PROGRAM EFFECTIVE DATE: MARCH 5, 2025); ADDENDUM 3, MARCH 2025 (API MONOGRAM PROGRAM EFFECTIVE DATE: SEPTEMBER 5, 2025)
TWENTY-FIFTH EDITION, NOVEMBER 2021, API MONOGRAM PROGRAM EFFECTIVE DATE: NOVEMBER 2022; ERRATA 1, DECEMBER 2021; ERRATA 2, APRIL 2022; ERRATA 3, OCTOBER 2023; ADDENDUM 1, APRIL 2023 (API MONOGRAM PROGRAM EFFECTIVE DATE: OCTOBER 2023); ADDENDUM 2, SEPTEMBER 2024 (API MONOGRAM PROGRAM EFFECTIVE DATE: MARCH 5, 2025); ADDENDUM 3, MARCH 2025 (API MONOGRAM PROGRAM EFFECTIVE DATE: SEPTEMBER 5, 2025)
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