N.J. Stat. § 18A:42-2: School orchestra not to compete with civilian musicians; exceptions

No music supervisor, music teacher or any person having charge of any band or orchestra connected with a public school of this state shall permit such band or orchestra to play, perform or furnish music as a school band or orchestra at any function in competition with civilian musicians. Excepted herefrom are functions connected with such public school and functions which shall be of a patriotic nature.

L.1967, c.271.