An interspinous cross connector system configured and designed to be implanted through the interspinous ligament by a rod that can puncture through the ligament while leaving the ligament intact. The cross connector system includes a first and second elongate rod and a third elongate rod connecting the first and second elongate rods using a cross connection assembly. The cross connection assembly includes a one-piece L-shaped connecting body comprising a receptacle facing outwards towards the first rod and away from the second rod and a clamp, and a set screw selectively positioned to securely hold the connecting body to the first rod. The connecting body is disposed substantially between the first and second elongate rods. The clamp allows the connecting body to slidingly engage with the third rod.