negative reserve balance
A negative reserve balance comprises the aggregate number of phonorecords made under a particular compulsory license, if any, that have been relinquished from possession for purposes of sale accompanied by a privilege of return, as described in paragraph (g)(3) of this section, and that have been returned to the compulsory licensee, but because all available phonorecord reserves have been eliminated, have not been used to reduce a phonorecord reserve.