An unencumbered license is not currently being subjected to formal discipline by the board of nursing in the state(s) in which the nurse is practicing and has no provisions or conditions that limit the nurse’s practice. Provisions or conditions may include, but are not limited to, direct supervision of practice, drug administration limitations and/or practice area exclusions. Nurses who do not hold an unencumbered license should email AACN at ., AACN Certification Corporation drives patient health and safety through the comprehensive credentialing of acute and critical care nurses, advancing practice consistent with standards of excellence. Accreditation for AACN certification programs is granted by the Accreditation Board for Specialty Nursing Certification (ABSNC) or the National , ACNPC-AG ® is an entry-level advanced practice board certification for acute care nurse practitioners (ACNPs) educated at the graduate level to provide continuous and comprehensive advanced nursing care to acutely ill adult-gerontology patients (young adults, older adults and frail elderly) experiencing episodic illness, exacerbation of .