For any building assigned to Seismic Design Category B, C, D, E or F with exterior unreinforced masonry walls, the alteration work shall include installation of wall anchors to resist out-of-plane seismic forces specified in Section A113.1.3 of this code at the roof and floor line, unless an evaluation demonstrates compliance of existing wall anchorage.
780 CMR, ch. 34, pt. 1, 307, [BS] 906.5