(1) Track clearances - in general . . . . 14'0"

The minimum distance between the centerlines of parallel standard gauge railroad tracks, which are used or proposed to be used for transporting cars, engines, motors, or like equipment, must be fourteen feet, except as set forth below.

(2) Track clearances - Main and subsidiary tracks . . . .15'0"

The centerline of any standard gauge track, except a main track or a passing track, parallel and adjacent to a main track or a passing track, must be at least fifteen feet from the centerline of the main track or passing track however, where a passing track is adjacent to and at least fifteen feet distant from the main track, any other track may be constructed adjacent to the passing track with 14 feet clearance.

(3) Track clearances - Parallel team, house, or industry tracks . . . . 13'0"

Minimum clearances between centerlines of parallel team, house, or industry tracks must be thirteen feet.

(4) Track clearances - Parallel ladder or ladder and other track . . . . 20'0"

The minimum clearance between centerlines of any standard gauge ladder track, constructed parallel to any other track, must be twenty feet.

(5) Track clearances - Existing tracks.

Tracks existing prior to October 9, 1969, may be extended at clearances lawfully prescribed prior to that date.