"<a name="start_28881.322819"></a>No, Jamie. Most brands back then, Hoover included, had a bag slide so that the bag could be emptied instead of instantly disposed of. Electrolux recommended using a bag twice before throwing it away. I believe Hoover was the same."
Fair point, although the wording implies that replacement is not necessary and therefore people would go by the sticker and discard the "use twice only" notice on the bag in most cases.