The mark consists of a closed circle that has black italic letters B, T, & C in the center with B and T next each other and & in the middle and C on the bottom. Within this closed circle is also colors of brown on the bottom, blue, yellowish green in the middle and blueish green at the top ending with blue at the very top.The circle is surrounded by another detached circle that is made of leaves facing upwards and connected mirroring the colors of the closed circle. The outer circle is open at the top and there is white between the closed circle and the surrounding leaf circle.