This report was prepared for submission to ISO in the context of a future revision of ISO 2965:2009 “Materials used as cigarette papers, filter plug wrap and filter joining paper, including materials having a discrete or oriented permeable zone and materials with bands of differing permeability – Determination of air permeability”. Specifically, neither the ISO Standard nor the equivalent CORESTA method (CRM 40) incorporate a recommendation for the measurement of samples of cigarette paper that are not fully enclosed by the smallest measurement clamp that is currently specified.