State-Boston Retirement System plans to make its first investment in value-added real estate, said Glenn M. Johnson, a consultant with New England Pension Consultants, the $3.6 billion plan's consultant. At least one manager is being sought to run up to a total of $60 million, Mr. Johnson said. No manager is being terminated; funding will come from rebalancing. The system will only consider managers with at least $500 million in real estate assets under management as of Sept. 30 and at least two existing public fund clients. Prospective managers must also agree to comply with Massachusetts General Law Chapter 32 and investment guidelines administered by Massachusetts' Public Employee Retirement Administration Commission, including the restriction on investing in tobacco-related companies.