The mark consists of a large white oval with a double black border with the inner border being thicker than the outer border, the block letters "TX" appear in black centered inside the oval, to the left of the "TX", and within the oval, appears a smaller oval with a thin black border, the left third of the oval contains a blue field with a white star, the remaining two thirds of the oval is split horizontally with a white field on top and a red field on the bottom, to the right of the "TX", and within the oval, appears a design consisting of a red five pointed star superimposed over a blue star or compass with 24 points, two arms of a green laurel or wreath with brown stems surround the stars and red ribbon containing the words "SURCULUS PERURO" in white letters runs across the bottom of the wreath just below the stars.