An optical information recording medium comprises a substrate and a multilayered film formed on the substrate, the multilayered film comprising a first information layer, a separating layer, and a second information layer in this order from the side of the substrate. The photo-electric safety system monitors for obstructions at more than one height along the barrier’s path between limit positions. When the key fob is in the driver-specific mode, the key fob transmits a driver-specific identification to the receiver, so that customizable vehicle settings are reset to driver-specific customized vehicle settings. Also disclosed are compositions containing compounds of Formula I and at least one carrier, diluent or excipient. The leak detection material can be a dye delivery composition including a mixture of leak detection dye and a solid carrier.