California Code, Business and Professions Code - BPC § 7110.5

Upon receipt of a certified copy of the Labor Commissioner's finding of a willful or deliberate violation of the Labor Code by a licensee, pursuant to Section 98.9 of the Labor Code, or upon transmission to the Contractors' State License Board of copies of any citations or other actions taken by the Division of Occupational Safety and Health pursuant to Article 12 (commencing with Section 3420) of Group 3 of Subchapter 7 of Chapter 4 of Division 1 of Title 8 of the Code of California Regulations, the registrar shall initiate disciplinary action against the licensee within 18 months from the date of the registrar's receipt of the violation.