Rule 4.5.206 - PRIORITY1A(1) These weeds are not present or have a very limited presence in Montana. Management criteria will require eradication if detected, education, and prevention: (a) Yellow starthistle (Centaurea solstitialis);(b) Dyer's woad (Isatis tinctoria);(c) Common reed (Phragmites australis ssp. Australis); and (d) Medusahead (Taeniatherum caput-medusae).NEW, 2010 MAR p. 217, Eff. 1/29/10; AMD, 2013 MAR p. 2419, Eff. 12/27/13; AMD, 2015 MAR p. 1042, Eff. 7/31/2015; AMD, 2017 MAR p. 185, Eff. 2/4/2017 AUTH: 80-7-802, MCA; IMP: 7-22-2101, MCA