Holders of this certification have demonstrated the ability to interpret between American Sign Language (ASL) and English-based sign language or transliterate between spoken English and a signed code for English. Holders of this certification are deaf or hard-of-hearing and interpretation/transliteration is rendered in ASL, spoken English and a signed code for English or written English. This credential was offered from 1972 to 1988.

• Type Certification
• Level Foundational