Part I: Fixes the applicable building codes, standards, and county amendments for the life of a building permit, subject to limited life-safety exceptions and ordinary permit expiration rules, as of the date a county accepts a complete building permit application or issues an authorization to proceed with construction. Part II: Specifies the applicability of the International Residential Code, as adopted and amended by the State Building Code Council. Authorizes a county to adopt amendments to the Hawaii state building code that are more stringent or less stringent than a corresponding state-adopted code provision, under certain circumstances, and repeals the counties' existing authority to amend or adopt the buildings code without council approval. Beginning on the effective date of the next statewide adoption of the International Code Council suite of applicable codes as the Hawaii state building code, changes the adoption of the Hawaii state building code from a two-year cycle to a six-year cycle. Part III: Appropriates funds for one staff position and necessary consultant services to carry out statewide code adoption, economic and hazard analyses, and administrative support.