The mark consists of the letter "A" appearing above and to the left of the letter "C", both centered within a stylized framed hexagon with a break appearing in the centered two lines meeting above the letters "A" and "C" and a break appearing in the two lines meeting to the lower right of the letter "C". The right top side line of the hexagon has an additional extension of the line to the right and has a separate short line appearing above its right end to create the impression of a roof and chimney.