Representatives shall, with the authorization of the Speaker, represent any standing or permanent select committee in any judicial proceeding initiated or intervened in pursuant to the authority described in the first or second resolving clause. That the Office of General Counsel of the House of Representatives is authorized to retain private counsel, either for pay or pro bono, to assist in the representation of any standing or permanent select committee in any judicial proceeding initiated or intervened in pursuant to the authority described in the first or second resolving clause.