In determining whether a newspaper or other publication has had more than two-thirds of its circulation outside this State during the past 12 months for the purposes of Subdivision (c) of Section 31013 of the Code, in the case of a newspaper or magazine which publishes a separate edition circulated in this State which does not carry the same advertising as that of other editions of the same publication, such separate edition shall be considered a separate newspaper or magazine from the other editions of the same publication with respect to any advertisement which is not to be carried in all editions of the newspaper or magazine.