(A) The Corporation will generally mark poles, posts, or other structures used for supporting electrical conductors with (1) the initials of its name, abbreviation of its name, corporate symbol, or other distinguishing mark by which the owner of each such structure may be readily and definitely determined, and (2) a number by which the location of each such structure may be described.
(B) The identification marks shall be made with paint, stamps, brands or other means as the Corporation may elect to use, and the characters of the marks shall be of such size and so spaced and hereafter maintained as to be easily read by one standing on the ground.
(C) In the event another public utility jointly owns any such structure with the Corporation, the distinguishing mark of each public utility may be placed thereon.