The approval of new statewide rules for the New York Supreme Court Appellate Division, one of which reduced from nine months to six the period for perfecting appeals, is expected to result in the automatic dismissal of a passel of civil appeals not perfected by Sept. 14.

Though a precise number couldn’t immediately be placed on the dismissals that would take effect Monday, they were one known side-effect of a new set of rules aimed at establishing some level of uniformity for New York’s intermediate appeals courts, whose four departments have historically operated independently of each other and developed their own way of doing things.