In 1995, when the ban went into effect, the only instrument allowed in the Cumberland prison was the harmonica, but inmates who already had a guitar or electronic keyboard were allowed to keep them.

1995年该禁令实行后，坎伯兰监狱的囚犯们被允许拥有的乐器就只剩下口琴了，但在此之前已经有电吉他或键盘的囚犯被批准可以保留这些乐器。