(1) For the purposes of this subchapter, the board adopts and incorporates by reference the following:

(a) 40 CFR 81.327, providing attainment status designation for Montana pursuant to section 107 of the FCAA;

(b) "Workbook for Plume Visual Impact Screening and Analysis" (Revised) (EPA-454/R-92/023), specifying methods for estimating visibility impairment.

(2) Copies of materials incorporated by reference in this subchapter may be obtained as referenced in ARM 17.8.102(3) and (4).