The Sacramento Preservation Commission took an important step toward protecting the River District's history Wednesday by recommending creation of a new historic district and designation of other properties as landmarks. The commission's six present members voted unanimously to recommend the Sacramento City Council create the North 16th Street Historic District and add nine properties found elsewhere in the River District to the Sacramento Register of Historic & Cultural Resources. At the same time, the commission postponed a decision on whether to start the historic landmark nomination process for the state printing plant at Seventh Street and Richards Boulevard. The building was design