Trademark Act Article 58
Time limit on filing invalidation and exceptionNo invalidation shall be filed, or no proposal for an invalidation shall be submitted, against a trademark registration on the grounds that such registration falls under Subparagraph 1 or 3 of Paragraph 1 of Article 29, any of Subparagraphs 9 through 15 of Paragraph 1 of Article 30, or Paragraph 3 of Article 65 if the registration has at that date been published for not less than five years.The period referred to in the preceding paragraph shall not apply to the invalidation against a trademark registration on the grounds that such registration falls under Subparagraph 9 or 11 of Paragraph 1 of Article 30 if the registration was applied for in bad faith.