6, 2021, currently do not reflect the change authorizing awards and decorations to be worn on the AGSU Class B uniform, according to an Army slide presentation included with the ALARACT, outlining the new guidelines. The Army's AR and DA PAM 670-1 uniform policies, dated Jan. 'The only difference is with the Class Bs, you have the option of wearing your insignia and accoutrements, whereas your Tropical Dress you must have that,' Mitchell said. The necktie is optional with short sleeves but mandatory for the long-sleeved shirt. Like the Tropical Dress version, the Class B can be worn with a long- or short-sleeved shirt. Quintana Mitchell, a noncommissioned officer for the Uniform Policy Branch, told. The new uniform guidance makes the Class B version almost identical to the Tropical Dress variation, which is primarily intended for soldiers in hot climates the tropical variation serves as the alternative for the Class A uniform, which requires the AGSU jacket, Master Sgt. 1, 2027, to acquire the new uniform, but the Army and Air Force Exchange Service has started offering the AGSU for purchase. Senior leaders approved the new AGSU for everyday wear in late 2018 as a replacement for the blue Army Service Uniform, or ASU, after deciding that uniform is often too formal for everyday business use.