(1) The commissioner may adopt rules necessary to allocate or apportion the designation of captured assessed value of property within proposed tax increment financing districts to permit compliance with the condition in this paragraph. Rules adopted pursuant to this paragraph are routine technical rules as defined in Title 5, chapter 375, subchapter 2-A.

(2) The acquisition, construction and installment of all real and personal property improvements, buildings, structures, fixtures and equipment included within the development program and financed through municipal bonded indebtedness must be completed within 5 8 years of the commissioner's approval of the designation of the tax increment financing district.