While not the scope of the practice, you can look at the test outlines for the national certification examinations. This will give you an idea what is expected of the NP in the particular specialty. ANCC, AANP, NCC, PCNB and AACN Certification Corporation all offer certification exams for NPs. The test outlines are all based on task analyses that survey NPs in the field for what they do based on frequency and criticality of the knowledge or skill. Some state boards use the knowledge and core competencies that are tested on the certification exams as the basis for the scope of practice.