Gov. Christopher J. Christie of New Jersey must receive approval from the state Legislature for his controversial plan to consolidate public universities to take effect, the state’s nonpartisan Office of Legislative Services said in a recent opinion. According to The Star-Ledger, which obtained a copy of the opinion, Governor Christie, a Republican, cannot use his executive power alone to shift control of several campuses around the state. In the most disputed of the proposals, the governor endorsed an advisory committee’s recommendation to give control of Rutgers University’s Camden campus to Rowan University, a proposal popular at the latter but assailed at the former, with charges that the governor was trying to reward a powerful political ally at the expense of the state’s top-tier public research university. Mr. Christie has insisted he will proceed with the merger plan despite the criticism.