It is the intent of the Legislature, in enacting this chapter, that the State Fire Marshal shall exercise exclusive safety regulatory and enforcement authority over intrastate hazardous liquid pipelines and, to the extent authorized by agreement between the State Fire Marshal and the United States Secretary of Transportation, and may act as agent for the United State Secretary of Transportation to implement the federal Hazardous Liquid Pipeline Safety Act (49 U.S.C. Sec. 2001 et seq.) and federal pipeline safety regulations as to those portions of interstate pipelines located within this state, as necessary to obtain annual federal certification.