The P-2 visa can be used for artists individually (unlike P-1) or as a group.
To bring musicians (or other entertainers) under the P-2 visa, an entertaining company must first establish or participate in a reciprocal exchange program with a US based organization.
The company must provide the name of such program and any other relevant documents.
The advisory opinion will be also required for a P-2 visa application from a labor organization or a peer group that was involved in the reciprocal exchange program.
The artists must be highly experienced and have skills similar to the U.S. entertainers in the reciprocal program. However, P-2 visa does require the same level of accomplishment as the P-1 visa, not the cultural unique nature of the performances required by P-3 visas. The reciprocal exchange program is the most important requirement.