of limitations for enforcement action Any action described in this subparagraph shall be commenced within the time period set forth in section 507(b). (iii) Other rights and remedies preserved The ability of the mechanical licensing collective or digital licensee coordinator to bring an action under this subparagraph shall in no way alter, limit or negate any other right or remedy that may be available to any party at law or in equity. (7) Funding of mechanical licensing collective (A) In general The total costs of the mechanical licensing collective shall be funded by— (i) an administrative assessment, as such assessment is established by the Copyright Royalty Judges pursuant to subparagraph (D) from time to time, to be paid by— (I) digital music providers that are engaged, in all or in part, in covered activities pursuant to a blanket license under this subsection