A Boston federal judge has ordered the executive director of a pension fund to file an affidavit next week addressing whether the fund can continue to serve as lead plaintiff in a securities class action against State Street Bank or hire new lawyers in light of a special master’s report reviewing potential overbilling in the case.

In a Thursday order, Judge Mark Wolf of the U.S. District Court for the District of Massachusetts told George Hopkins, the executive director of the Arkansas Teacher Retirement System, to file an affidavit by June 6 that states “whether ATRS wishes to continue to represent the customer class, and if so, whether it intends to continue to seek legal advice concerning this case from Labaton or seek advice instead from counsel whose conduct is not at issue.”