Section 24-60-1307 - Effective dates(1) All provisions of this part 13, including membership in the multistate tax commission, shall be effective upon execution of the compact by the governor; except that: (a) Provisions of articles III, IV, V, VIII, and IX of the compact shall apply to all taxable years beginning on and after July 1, 1968; and(b) In no case shall the provisions of this part 13 apply to taxable years commencing on or before June 30, 1968.L. 68: p. 188, § 2. C.R.S. 1963: § 74-14-6.