ASIA and ISCoS have release updated and revised standards for the International Standards for Neurological Classification of Spinal Cord Injury (formerly the ASIA) exam. The booklet is available for purchase, but the scoresheet can be downloaded for free here:

Keep in mind that providers or therapists who perform this exam should have completed the on-line or in-person training program in administration of the exam, which is also available on the ASIA website (for a fee).