The certification mark, as used (or, if filing under 15 U.S.C. 1051(b), intended to be used) by authorized persons, certifies (or, if filing under 15 U.S.C. 1051(b), is intended to certify): that lumber has been factory coated with coating of proper type supplied by Applicant and at sufficient coverage rate to assure performance life of the lumber in exterior building constructions.