; provided, however, that— (i) each copyright owner shall establish the royalty rates and material license terms of any such voluntary license individually and not in agreement, combination, or concert with any other copyright owner; (ii) each person entitled to obtain a compulsory license under this section shall establish the royalty rates and material license terms of any such voluntary license individually and not in agreement, combination, or concert with any other digital music provider; and (iii) the mechanical licensing collective shall maintain the confidentiality of the voluntary licenses in accordance with the confidentiality provisions prescribed by the Register of Copyrights under subsection (d)(12)(C). (D) Liability for good-faith activities The mechanical licensing collective shall not be liable to any person or entity based on a claim arising from its good-faith administration of policies and procedures adopted and implemented to carry out the responsibilities set forth in subparagraphs (J) and (K) of paragraph (3), except to the extent of correcting an underpayment or overpayment of royalties as provided in paragraph (3)(L)(i)(VI)